diff --git a/README.md b/README.md
index bce62b2..3cb70b2 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,15 @@
 
 A Flutter application for interfacing with the Friendica social network.
 
-For Linux development be sure that libsecret-1-dev and libjsoncpp-dev are installed on the machine. For running only make sure the non-dev versions are...
+For Linux development be sure that libsecret-1-dev and libjsoncpp-dev are installed on the machine. For running only
+make sure the non-dev versions are...
 
+## Development Notes
+
+Whenever a model is changed that is stored in ObjectBox it is necessary to execute the command:
+
+```bash
+flutter pub run build_runner build
+```
 
 Licensed with the Mozilla Public License 2.0 copyleft license.
diff --git a/android/app/src/debug/AndroidManifest.xml b/android/app/src/debug/AndroidManifest.xml
index c29ba58..5c9e0d1 100644
--- a/android/app/src/debug/AndroidManifest.xml
+++ b/android/app/src/debug/AndroidManifest.xml
@@ -5,4 +5,5 @@
          to allow setting breakpoints, to provide hot reload, etc.
     -->
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 </manifest>
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index dd26b82..831fd53 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -37,4 +37,6 @@
             <data android:scheme="https" />
         </intent>
     </queries>
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 </manifest>
diff --git a/android/app/src/profile/AndroidManifest.xml b/android/app/src/profile/AndroidManifest.xml
index c29ba58..5c9e0d1 100644
--- a/android/app/src/profile/AndroidManifest.xml
+++ b/android/app/src/profile/AndroidManifest.xml
@@ -5,4 +5,5 @@
          to allow setting breakpoints, to provide hot reload, etc.
     -->
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 </manifest>
diff --git a/ios/Podfile.lock b/ios/Podfile.lock
index 7caad5f..f7df94d 100644
--- a/ios/Podfile.lock
+++ b/ios/Podfile.lock
@@ -43,6 +43,10 @@ PODS:
   - FMDB/standard (2.7.5)
   - image_picker_ios (0.0.1):
     - Flutter
+  - ObjectBox (1.8.1-rc)
+  - objectbox_flutter_libs (0.0.1):
+    - Flutter
+    - ObjectBox (= 1.8.1-rc)
   - path_provider_ios (0.0.1):
     - Flutter
   - SDWebImage (5.13.2):
@@ -66,6 +70,7 @@ DEPENDENCIES:
   - flutter_file_dialog (from `.symlinks/plugins/flutter_file_dialog/ios`)
   - flutter_secure_storage (from `.symlinks/plugins/flutter_secure_storage/ios`)
   - image_picker_ios (from `.symlinks/plugins/image_picker_ios/ios`)
+  - objectbox_flutter_libs (from `.symlinks/plugins/objectbox_flutter_libs/ios`)
   - path_provider_ios (from `.symlinks/plugins/path_provider_ios/ios`)
   - shared_preferences_foundation (from `.symlinks/plugins/shared_preferences_foundation/ios`)
   - sqflite (from `.symlinks/plugins/sqflite/ios`)
@@ -77,6 +82,7 @@ SPEC REPOS:
     - DKImagePickerController
     - DKPhotoGallery
     - FMDB
+    - ObjectBox
     - SDWebImage
     - SwiftyGif
 
@@ -91,6 +97,8 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/flutter_secure_storage/ios"
   image_picker_ios:
     :path: ".symlinks/plugins/image_picker_ios/ios"
+  objectbox_flutter_libs:
+    :path: ".symlinks/plugins/objectbox_flutter_libs/ios"
   path_provider_ios:
     :path: ".symlinks/plugins/path_provider_ios/ios"
   shared_preferences_foundation:
@@ -111,6 +119,8 @@ SPEC CHECKSUMS:
   flutter_secure_storage: 23fc622d89d073675f2eaa109381aefbcf5a49be
   FMDB: 2ce00b547f966261cd18927a3ddb07cb6f3db82a
   image_picker_ios: b786a5dcf033a8336a657191401bfdf12017dabb
+  ObjectBox: 7615cc462f2976cb45127d301a17cb473edf3f9e
+  objectbox_flutter_libs: 55835e03ff76bf9d5ce0a41a2ef3902d2e8c1f20
   path_provider_ios: 14f3d2fd28c4fdb42f44e0f751d12861c43cee02
   SDWebImage: 72f86271a6f3139cc7e4a89220946489d4b9a866
   shared_preferences_foundation: 297b3ebca31b34ec92be11acd7fb0ba932c822ca
diff --git a/lib/controls/timeline/interactions_bar_control.dart b/lib/controls/timeline/interactions_bar_control.dart
index 9dc8653..247a73e 100644
--- a/lib/controls/timeline/interactions_bar_control.dart
+++ b/lib/controls/timeline/interactions_bar_control.dart
@@ -133,7 +133,7 @@ class _InteractionsBarControlState extends State<InteractionsBarControl> {
         );
       }
     } else {
-      context.push('/post/view/${widget.entry.id}');
+      context.push('/post/view/${widget.entry.id}/${widget.entry.id}');
     }
   }
 
diff --git a/lib/data/interfaces/connections_repo_intf.dart b/lib/data/interfaces/connections_repo_intf.dart
new file mode 100644
index 0000000..36beb28
--- /dev/null
+++ b/lib/data/interfaces/connections_repo_intf.dart
@@ -0,0 +1,34 @@
+import 'package:result_monad/result_monad.dart';
+
+import '../../models/connection.dart';
+import '../../models/exec_error.dart';
+
+class IConnectionsRepo {
+  bool addConnection(Connection connection) {
+    throw UnimplementedError();
+  }
+
+  bool addAllConnections(Iterable<Connection> newConnections) {
+    throw UnimplementedError();
+  }
+
+  bool updateConnection(Connection connection) {
+    throw UnimplementedError();
+  }
+
+  Result<Connection, ExecError> getById(String id) {
+    throw UnimplementedError();
+  }
+
+  Result<Connection, ExecError> getByName(String name) {
+    throw UnimplementedError();
+  }
+
+  List<Connection> getMyContacts() {
+    throw UnimplementedError();
+  }
+
+  List<Connection> getKnownUsersByName(String name) {
+    throw UnimplementedError();
+  }
+}
diff --git a/lib/data/interfaces/groups_repo.intf.dart b/lib/data/interfaces/groups_repo.intf.dart
new file mode 100644
index 0000000..1ab1437
--- /dev/null
+++ b/lib/data/interfaces/groups_repo.intf.dart
@@ -0,0 +1,26 @@
+import 'package:result_monad/result_monad.dart';
+
+import '../../models/exec_error.dart';
+import '../../models/group_data.dart';
+
+class IGroupsRepo {
+  void addAllGroups(List<GroupData> groups) {
+    throw UnimplementedError();
+  }
+
+  void clearGroups() {
+    throw UnimplementedError();
+  }
+
+  List<GroupData> getMyGroups() {
+    throw UnimplementedError();
+  }
+
+  Result<List<GroupData>, ExecError> getGroupsForUser(String id) {
+    throw UnimplementedError();
+  }
+
+  bool updateConnectionGroupData(String id, List<GroupData> currentGroups) {
+    throw UnimplementedError();
+  }
+}
diff --git a/lib/data/interfaces/hashtag_repo_intf.dart b/lib/data/interfaces/hashtag_repo_intf.dart
new file mode 100644
index 0000000..ae9f17d
--- /dev/null
+++ b/lib/data/interfaces/hashtag_repo_intf.dart
@@ -0,0 +1,11 @@
+import '../../models/hashtag.dart';
+
+class IHashtagRepo {
+  void add(Hashtag tag) {
+    throw UnimplementedError();
+  }
+
+  List<String> getMatchingHashTags(String text) {
+    throw UnimplementedError();
+  }
+}
diff --git a/lib/data/memory/memory_connections_repo.dart b/lib/data/memory/memory_connections_repo.dart
new file mode 100644
index 0000000..bd43aa8
--- /dev/null
+++ b/lib/data/memory/memory_connections_repo.dart
@@ -0,0 +1,97 @@
+import 'package:result_monad/result_monad.dart';
+
+import '../../models/connection.dart';
+import '../../models/exec_error.dart';
+import '../interfaces/connections_repo_intf.dart';
+
+class MemoryConnectionsRepo implements IConnectionsRepo {
+  final _connectionsById = <String, Connection>{};
+  final _connectionsByName = <String, Connection>{};
+  final _myContacts = <Connection>[];
+
+  @override
+  bool addAllConnections(Iterable<Connection> newConnections) {
+    bool result = true;
+
+    for (final connection in newConnections) {
+      result &= addConnection(connection);
+    }
+
+    return result;
+  }
+
+  @override
+  bool addConnection(Connection connection) {
+    if (_connectionsById.containsKey(connection.id)) {
+      return false;
+    }
+    return updateConnection(connection);
+  }
+
+  @override
+  List<Connection> getKnownUsersByName(String name) {
+    return _connectionsByName.values.where((it) {
+      final normalizedHandle = it.handle.toLowerCase();
+      final normalizedName = it.name.toLowerCase();
+      final normalizedQuery = name.toLowerCase();
+      return normalizedHandle.contains(normalizedQuery) ||
+          normalizedName.contains(normalizedQuery);
+    }).toList();
+  }
+
+  @override
+  bool updateConnection(Connection connection) {
+    _connectionsById[connection.id] = connection;
+    _connectionsByName[connection.name] = connection;
+    int index = _myContacts.indexWhere((c) => c.id == connection.id);
+    if (index >= 0) {
+      _myContacts.removeAt(index);
+    }
+    switch (connection.status) {
+      case ConnectionStatus.youFollowThem:
+      case ConnectionStatus.theyFollowYou:
+      case ConnectionStatus.mutual:
+        if (index > 0) {
+          _myContacts.insert(index, connection);
+        } else {
+          _myContacts.add(connection);
+        }
+        break;
+      default:
+        break;
+    }
+
+    return true;
+  }
+
+  @override
+  List<Connection> getMyContacts() {
+    return _myContacts;
+  }
+
+  @override
+  Result<Connection, ExecError> getById(String id) {
+    final result = _connectionsById[id];
+    if (result == null) {
+      return Result.error(ExecError(
+        type: ErrorType.notFound,
+        message: '$id not found',
+      ));
+    }
+
+    return Result.ok(result);
+  }
+
+  @override
+  Result<Connection, ExecError> getByName(String name) {
+    final result = _connectionsByName[name];
+    if (result == null) {
+      return Result.error(ExecError(
+        type: ErrorType.notFound,
+        message: '$name not found',
+      ));
+    }
+
+    return Result.ok(result);
+  }
+}
diff --git a/lib/data/memory/memory_groups_repo.dart b/lib/data/memory/memory_groups_repo.dart
new file mode 100644
index 0000000..a3ce883
--- /dev/null
+++ b/lib/data/memory/memory_groups_repo.dart
@@ -0,0 +1,43 @@
+import 'package:result_monad/result_monad.dart';
+
+import '../../models/exec_error.dart';
+import '../../models/group_data.dart';
+import '../interfaces/groups_repo.intf.dart';
+
+class MemoryGroupsRepo implements IGroupsRepo {
+  final _groupsForConnection = <String, List<GroupData>>{};
+  final _myGroups = <GroupData>{};
+
+  @override
+  Result<List<GroupData>, ExecError> getGroupsForUser(String id) {
+    if (!_groupsForConnection.containsKey(id)) {
+      return Result.error(ExecError(
+        type: ErrorType.notFound,
+        message: '$id not a known user ID',
+      ));
+    }
+
+    return Result.ok(_groupsForConnection[id]!);
+  }
+
+  @override
+  List<GroupData> getMyGroups() {
+    return _myGroups.toList();
+  }
+
+  @override
+  void clearGroups() {
+    _myGroups.clear();
+  }
+
+  @override
+  void addAllGroups(List<GroupData> groups) {
+    _myGroups.addAll(groups);
+  }
+
+  @override
+  bool updateConnectionGroupData(String id, List<GroupData> currentGroups) {
+    _groupsForConnection[id] = currentGroups;
+    return true;
+  }
+}
diff --git a/lib/data/objectbox/objectbox_cache.dart b/lib/data/objectbox/objectbox_cache.dart
new file mode 100644
index 0000000..29cc714
--- /dev/null
+++ b/lib/data/objectbox/objectbox_cache.dart
@@ -0,0 +1,23 @@
+import 'package:logging/logging.dart';
+import 'package:objectbox/objectbox.dart';
+import 'package:path/path.dart' as p;
+import 'package:path_provider/path_provider.dart';
+
+import '../../objectbox.g.dart';
+
+class ObjectBoxCache {
+  static final _logger = Logger('ObjectBoxCache');
+  late final Store store;
+
+  ObjectBoxCache._create(this.store);
+
+  static Future<ObjectBoxCache> create() async {
+    final docsDir = await getApplicationSupportDirectory();
+
+    final path = p.join(docsDir.path, 'objectboxcache');
+    _logger.info('ObjectBoxCache path: $path');
+    final store = await openStore(
+        directory: path, macosApplicationGroup: 'friendica_portal');
+    return ObjectBoxCache._create(store);
+  }
+}
diff --git a/lib/data/objectbox/objectbox_connections_repo.dart b/lib/data/objectbox/objectbox_connections_repo.dart
new file mode 100644
index 0000000..734918c
--- /dev/null
+++ b/lib/data/objectbox/objectbox_connections_repo.dart
@@ -0,0 +1,104 @@
+import 'package:result_monad/result_monad.dart';
+
+import '../../globals.dart';
+import '../../models/connection.dart';
+import '../../models/exec_error.dart';
+import '../../objectbox.g.dart';
+import '../interfaces/connections_repo_intf.dart';
+import '../memory/memory_connections_repo.dart';
+import 'objectbox_cache.dart';
+
+class ObjectBoxConnectionsRepo implements IConnectionsRepo {
+  late final Box<Connection> box;
+  final memCache = MemoryConnectionsRepo();
+
+  ObjectBoxConnectionsRepo() {
+    box = getIt<ObjectBoxCache>().store.box<Connection>();
+  }
+
+  @override
+  bool addAllConnections(Iterable<Connection> newConnections) {
+    memCache.addAllConnections(newConnections);
+    final result = box.putMany(newConnections.toList());
+    return result.length == newConnections.length;
+  }
+
+  @override
+  bool addConnection(Connection connection) {
+    memCache.addConnection(connection);
+    box.putAsync(connection);
+    return true;
+  }
+
+  @override
+  Result<Connection, ExecError> getById(String id) {
+    final result = memCache.getById(id);
+    if (result.isSuccess) {
+      return result;
+    }
+
+    return _getConnection(
+      Connection_.id.equals(id),
+    ).mapError(
+      (error) => error.copy(
+        message: "Can't find Connection for ID: $id",
+      ),
+    );
+  }
+
+  @override
+  Result<Connection, ExecError> getByName(String name) {
+    final result = memCache.getByName(name);
+    if (result.isSuccess) {
+      return result;
+    }
+    return _getConnection(
+      Connection_.name.equals(name),
+    ).mapError(
+      (error) => error.copy(
+        message: "Can't find Connection for ID: $name",
+      ),
+    );
+  }
+
+  @override
+  List<Connection> getKnownUsersByName(String name) {
+    return box
+        .query(
+          Connection_.name.contains(name, caseSensitive: false) |
+              Connection_.handle.contains(name, caseSensitive: false),
+        )
+        .build()
+        .find();
+  }
+
+  @override
+  List<Connection> getMyContacts() {
+    final connectedStatuses = [
+      ConnectionStatus.youFollowThem.code,
+      ConnectionStatus.theyFollowYou.code,
+      ConnectionStatus.mutual.code,
+    ];
+    return box
+        .query(Connection_.dbStatus.oneOf(connectedStatuses))
+        .build()
+        .find();
+  }
+
+  @override
+  bool updateConnection(Connection connection) {
+    memCache.updateConnection(connection);
+    box.put(connection);
+    return true;
+  }
+
+  Result<Connection, ExecError> _getConnection(Condition<Connection> query) {
+    final connection = box.query(query).build().findFirst();
+    if (connection == null) {
+      return buildErrorResult(type: ErrorType.notFound);
+    }
+
+    memCache.addConnection(connection);
+    return Result.ok(connection);
+  }
+}
diff --git a/lib/data/objectbox/objectbox_hashtag_repo.dart b/lib/data/objectbox/objectbox_hashtag_repo.dart
new file mode 100644
index 0000000..46c741b
--- /dev/null
+++ b/lib/data/objectbox/objectbox_hashtag_repo.dart
@@ -0,0 +1,34 @@
+import '../../globals.dart';
+import '../../models/hashtag.dart';
+import '../../objectbox.g.dart';
+import '../interfaces/hashtag_repo_intf.dart';
+import 'objectbox_cache.dart';
+
+class ObjectBoxHashtagRepo implements IHashtagRepo {
+  late final Box<Hashtag> box;
+
+  ObjectBoxHashtagRepo() {
+    box = getIt<ObjectBoxCache>().store.box<Hashtag>();
+  }
+
+  @override
+  void add(Hashtag tag) {
+    box.putAsync(tag);
+  }
+
+  @override
+  List<String> getMatchingHashTags(String text) {
+    return (box
+            .query(
+              text.length <= 2
+                  ? Hashtag_.tag.startsWith(text, caseSensitive: false)
+                  : Hashtag_.tag.contains(text, caseSensitive: false),
+            )
+            .order(Hashtag_.tag)
+            .build()
+          ..limit = 100)
+        .find()
+        .map((h) => h.tag)
+        .toList();
+  }
+}
diff --git a/lib/main.dart b/lib/main.dart
index 3bc46fd..f9e016f 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -5,6 +5,13 @@ import 'package:multi_trigger_autocomplete/multi_trigger_autocomplete.dart';
 import 'package:provider/provider.dart';
 import 'package:result_monad/result_monad.dart';
 
+import 'data/interfaces/connections_repo_intf.dart';
+import 'data/interfaces/groups_repo.intf.dart';
+import 'data/interfaces/hashtag_repo_intf.dart';
+import 'data/memory/memory_groups_repo.dart';
+import 'data/objectbox/objectbox_cache.dart';
+import 'data/objectbox/objectbox_connections_repo.dart';
+import 'data/objectbox/objectbox_hashtag_repo.dart';
 import 'globals.dart';
 import 'models/TimelineIdentifiers.dart';
 import 'routes.dart';
@@ -39,11 +46,18 @@ void main() async {
   final entryManagerService = EntryManagerService();
   final timelineManager = TimelineManager();
   final galleryService = GalleryService();
+
   getIt.registerSingletonAsync(() async {
     final service = SettingsService();
     await service.initialize();
     return service;
   });
+
+  final objectBoxCache = await ObjectBoxCache.create();
+  getIt.registerSingleton<ObjectBoxCache>(objectBoxCache);
+  getIt.registerSingleton<IConnectionsRepo>(ObjectBoxConnectionsRepo());
+  getIt.registerSingleton<IHashtagRepo>(ObjectBoxHashtagRepo());
+  getIt.registerSingleton<IGroupsRepo>(MemoryGroupsRepo());
   getIt.registerLazySingleton<ConnectionsManager>(() => ConnectionsManager());
   getIt.registerLazySingleton<HashtagService>(() => HashtagService());
   getIt.registerSingleton(galleryService);
diff --git a/lib/models/connection.dart b/lib/models/connection.dart
index 43b13c2..00b9e6d 100644
--- a/lib/models/connection.dart
+++ b/lib/models/connection.dart
@@ -1,44 +1,67 @@
+import 'package:objectbox/objectbox.dart';
+
+@Entity()
 class Connection {
-  final ConnectionStatus status;
+  @Id()
+  int obId;
+
+  ConnectionStatus status;
+
+  int get dbStatus => status.code;
+
+  set dbStatus(int value) => status = ConnectionStatus.fromValue(value);
 
   final String name;
 
   final String handle;
 
+  @Unique(onConflict: ConflictStrategy.replace)
   final String id;
 
-  final Uri profileUrl;
+  final String profileUrl;
 
   final String network;
 
-  final Uri avatarUrl;
+  final String avatarUrl;
 
-  Connection({this.status = ConnectionStatus.unknown,
-    this.name = '',
-    this.handle = '',
-    this.id = '',
-    Uri? profileUrl,
-    this.network = '',
-    Uri? avatarUrl})
-      : profileUrl = profileUrl ?? Uri(),
-        avatarUrl = avatarUrl ?? Uri();
+  @Property(type: PropertyType.date)
+  final DateTime lastUpdateTime;
+
+  Connection(
+      {this.obId = 0,
+      this.status = ConnectionStatus.unknown,
+      this.name = '',
+      this.handle = '',
+      this.id = '',
+      String? profileUrl,
+      this.network = '',
+      String? avatarUrl,
+      DateTime? lastUpdateTime})
+      : profileUrl = profileUrl ?? '',
+        avatarUrl = avatarUrl ?? '',
+        lastUpdateTime = lastUpdateTime ?? DateTime.now();
 
   bool get isEmpty =>
       name.isEmpty &&
-          id.isEmpty &&
-          network.isEmpty &&
-          status == ConnectionStatus.unknown;
+      id.isEmpty &&
+      network.isEmpty &&
+      status == ConnectionStatus.unknown;
 
   bool get isNotEmpty => !isEmpty;
 
-  Connection copy({ConnectionStatus? status,
+  Connection copy({
+    int? obId,
+    ConnectionStatus? status,
     String? name,
     String? handle,
     String? id,
-    Uri? profileUrl,
+    String? profileUrl,
     String? network,
-    Uri? avatarUrl}) =>
+    String? avatarUrl,
+    DateTime? lastUpdateTime,
+  }) =>
       Connection(
+        obId: obId ?? this.obId,
         status: status ?? this.status,
         name: name ?? this.name,
         handle: handle ?? this.handle,
@@ -46,6 +69,7 @@ class Connection {
         profileUrl: profileUrl ?? this.profileUrl,
         network: network ?? this.network,
         avatarUrl: avatarUrl ?? this.avatarUrl,
+        lastUpdateTime: lastUpdateTime ?? this.lastUpdateTime,
       );
 
   @override
@@ -56,20 +80,28 @@ class Connection {
   @override
   bool operator ==(Object other) =>
       identical(this, other) ||
-          other is Connection && runtimeType == other.runtimeType &&
-              id == other.id;
+      other is Connection && runtimeType == other.runtimeType && id == other.id;
 
   @override
   int get hashCode => id.hashCode;
 }
 
 enum ConnectionStatus {
-  youFollowThem,
-  theyFollowYou,
-  mutual,
-  you,
-  none,
-  unknown,
+  youFollowThem(1),
+  theyFollowYou(2),
+  mutual(3),
+  you(4),
+  none(5),
+  unknown(6),
+  ;
+
+  final int code;
+
+  const ConnectionStatus(this.code);
+
+  factory ConnectionStatus.fromValue(int value) {
+    return ConnectionStatus.values.where((e) => e.code == value).first;
+  }
 }
 
 extension FriendStatusWriter on ConnectionStatus {
diff --git a/lib/models/exec_error.dart b/lib/models/exec_error.dart
index b0d0f68..961ef7c 100644
--- a/lib/models/exec_error.dart
+++ b/lib/models/exec_error.dart
@@ -1,11 +1,31 @@
 import 'package:result_monad/result_monad.dart';
 
+Result<T, ExecError> buildErrorResult<T>({
+  required ErrorType type,
+  String message = '',
+}) =>
+    Result.error(
+      ExecError(
+        type: type,
+        message: message,
+      ),
+    );
+
 class ExecError {
   final ErrorType type;
   final String message;
 
   ExecError({required this.type, this.message = ''});
 
+  ExecError copy({
+    ErrorType? type,
+    String? message,
+  }) =>
+      ExecError(
+        type: type ?? this.type,
+        message: message ?? this.message,
+      );
+
   @override
   String toString() {
     return 'ExecError{type: $type, message: $message}';
diff --git a/lib/models/hashtag.dart b/lib/models/hashtag.dart
new file mode 100644
index 0000000..6d2afa5
--- /dev/null
+++ b/lib/models/hashtag.dart
@@ -0,0 +1,30 @@
+import 'package:objectbox/objectbox.dart';
+
+@Entity()
+class Hashtag {
+  @Id()
+  int id;
+
+  @Unique(onConflict: ConflictStrategy.replace)
+  String tag;
+
+  String url;
+
+  @Property(type: PropertyType.date)
+  DateTime lastUpdateTime;
+
+  Hashtag({
+    this.id = 0,
+    required this.tag,
+    required this.url,
+    DateTime? updateTime,
+  }) : lastUpdateTime = updateTime ?? DateTime.now();
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is Hashtag && runtimeType == other.runtimeType && tag == other.tag;
+
+  @override
+  int get hashCode => tag.hashCode;
+}
diff --git a/lib/objectbox-model.json b/lib/objectbox-model.json
new file mode 100644
index 0000000..2597277
--- /dev/null
+++ b/lib/objectbox-model.json
@@ -0,0 +1,105 @@
+{
+  "_note1": "KEEP THIS FILE! Check it into a version control system (VCS) like git.",
+  "_note2": "ObjectBox manages crucial IDs for your object model. See docs for details.",
+  "_note3": "If you have VCS merge conflicts, you must resolve them according to ObjectBox docs.",
+  "entities": [
+    {
+      "id": "1:1213035855270739890",
+      "lastPropertyId": "9:7727190023732579468",
+      "name": "Connection",
+      "properties": [
+        {
+          "id": "1:4133343279264917280",
+          "name": "obId",
+          "type": 6,
+          "flags": 1
+        },
+        {
+          "id": "2:3393770296096844708",
+          "name": "name",
+          "type": 9
+        },
+        {
+          "id": "3:5864801995210079539",
+          "name": "handle",
+          "type": 9
+        },
+        {
+          "id": "4:2926904168461994523",
+          "name": "id",
+          "type": 9,
+          "flags": 34848,
+          "indexId": "1:8342366639839511243"
+        },
+        {
+          "id": "5:3621370552742492695",
+          "name": "network",
+          "type": 9
+        },
+        {
+          "id": "6:3054748457893853359",
+          "name": "profileUrl",
+          "type": 9
+        },
+        {
+          "id": "7:3716471511430220806",
+          "name": "avatarUrl",
+          "type": 9
+        },
+        {
+          "id": "8:3334077197732145885",
+          "name": "dbStatus",
+          "type": 6
+        },
+        {
+          "id": "9:7727190023732579468",
+          "name": "lastUpdateTime",
+          "type": 10
+        }
+      ],
+      "relations": []
+    },
+    {
+      "id": "2:8060242331335522964",
+      "lastPropertyId": "4:985152873657204249",
+      "name": "Hashtag",
+      "properties": [
+        {
+          "id": "1:3633001791521338712",
+          "name": "id",
+          "type": 6,
+          "flags": 1
+        },
+        {
+          "id": "2:3468373950035339457",
+          "name": "tag",
+          "type": 9,
+          "flags": 34848,
+          "indexId": "2:6156017341759176249"
+        },
+        {
+          "id": "3:5102584273729210526",
+          "name": "url",
+          "type": 9
+        },
+        {
+          "id": "4:985152873657204249",
+          "name": "lastUpdateTime",
+          "type": 10
+        }
+      ],
+      "relations": []
+    }
+  ],
+  "lastEntityId": "2:8060242331335522964",
+  "lastIndexId": "2:6156017341759176249",
+  "lastRelationId": "0:0",
+  "lastSequenceId": "0:0",
+  "modelVersion": 5,
+  "modelVersionParserMinimum": 5,
+  "retiredEntityUids": [],
+  "retiredIndexUids": [],
+  "retiredPropertyUids": [],
+  "retiredRelationUids": [],
+  "version": 1
+}
\ No newline at end of file
diff --git a/lib/objectbox.g.dart b/lib/objectbox.g.dart
new file mode 100644
index 0000000..82ec189
--- /dev/null
+++ b/lib/objectbox.g.dart
@@ -0,0 +1,287 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// This code was generated by ObjectBox. To update it run the generator again:
+// With a Flutter package, run `flutter pub run build_runner build`.
+// With a Dart package, run `dart run build_runner build`.
+// See also https://docs.objectbox.io/getting-started#generate-objectbox-code
+
+// ignore_for_file: camel_case_types
+// coverage:ignore-file
+
+import 'dart:typed_data';
+
+import 'package:flat_buffers/flat_buffers.dart' as fb;
+import 'package:objectbox/internal.dart'; // generated code can access "internal" functionality
+import 'package:objectbox/objectbox.dart';
+import 'package:objectbox_flutter_libs/objectbox_flutter_libs.dart';
+
+import 'models/connection.dart';
+import 'models/hashtag.dart';
+
+export 'package:objectbox/objectbox.dart'; // so that callers only have to import this file
+
+final _entities = <ModelEntity>[
+  ModelEntity(
+      id: const IdUid(1, 1213035855270739890),
+      name: 'Connection',
+      lastPropertyId: const IdUid(9, 7727190023732579468),
+      flags: 0,
+      properties: <ModelProperty>[
+        ModelProperty(
+            id: const IdUid(1, 4133343279264917280),
+            name: 'obId',
+            type: 6,
+            flags: 1),
+        ModelProperty(
+            id: const IdUid(2, 3393770296096844708),
+            name: 'name',
+            type: 9,
+            flags: 0),
+        ModelProperty(
+            id: const IdUid(3, 5864801995210079539),
+            name: 'handle',
+            type: 9,
+            flags: 0),
+        ModelProperty(
+            id: const IdUid(4, 2926904168461994523),
+            name: 'id',
+            type: 9,
+            flags: 34848,
+            indexId: const IdUid(1, 8342366639839511243)),
+        ModelProperty(
+            id: const IdUid(5, 3621370552742492695),
+            name: 'network',
+            type: 9,
+            flags: 0),
+        ModelProperty(
+            id: const IdUid(6, 3054748457893853359),
+            name: 'profileUrl',
+            type: 9,
+            flags: 0),
+        ModelProperty(
+            id: const IdUid(7, 3716471511430220806),
+            name: 'avatarUrl',
+            type: 9,
+            flags: 0),
+        ModelProperty(
+            id: const IdUid(8, 3334077197732145885),
+            name: 'dbStatus',
+            type: 6,
+            flags: 0),
+        ModelProperty(
+            id: const IdUid(9, 7727190023732579468),
+            name: 'lastUpdateTime',
+            type: 10,
+            flags: 0)
+      ],
+      relations: <ModelRelation>[],
+      backlinks: <ModelBacklink>[]),
+  ModelEntity(
+      id: const IdUid(2, 8060242331335522964),
+      name: 'Hashtag',
+      lastPropertyId: const IdUid(4, 985152873657204249),
+      flags: 0,
+      properties: <ModelProperty>[
+        ModelProperty(
+            id: const IdUid(1, 3633001791521338712),
+            name: 'id',
+            type: 6,
+            flags: 1),
+        ModelProperty(
+            id: const IdUid(2, 3468373950035339457),
+            name: 'tag',
+            type: 9,
+            flags: 34848,
+            indexId: const IdUid(2, 6156017341759176249)),
+        ModelProperty(
+            id: const IdUid(3, 5102584273729210526),
+            name: 'url',
+            type: 9,
+            flags: 0),
+        ModelProperty(
+            id: const IdUid(4, 985152873657204249),
+            name: 'lastUpdateTime',
+            type: 10,
+            flags: 0)
+      ],
+      relations: <ModelRelation>[],
+      backlinks: <ModelBacklink>[])
+];
+
+/// Open an ObjectBox store with the model declared in this file.
+Future<Store> openStore(
+        {String? directory,
+        int? maxDBSizeInKB,
+        int? fileMode,
+        int? maxReaders,
+        bool queriesCaseSensitiveDefault = true,
+        String? macosApplicationGroup}) async =>
+    Store(getObjectBoxModel(),
+        directory: directory ?? (await defaultStoreDirectory()).path,
+        maxDBSizeInKB: maxDBSizeInKB,
+        fileMode: fileMode,
+        maxReaders: maxReaders,
+        queriesCaseSensitiveDefault: queriesCaseSensitiveDefault,
+        macosApplicationGroup: macosApplicationGroup);
+
+/// ObjectBox model definition, pass it to [Store] - Store(getObjectBoxModel())
+ModelDefinition getObjectBoxModel() {
+  final model = ModelInfo(
+      entities: _entities,
+      lastEntityId: const IdUid(2, 8060242331335522964),
+      lastIndexId: const IdUid(2, 6156017341759176249),
+      lastRelationId: const IdUid(0, 0),
+      lastSequenceId: const IdUid(0, 0),
+      retiredEntityUids: const [],
+      retiredIndexUids: const [],
+      retiredPropertyUids: const [],
+      retiredRelationUids: const [],
+      modelVersion: 5,
+      modelVersionParserMinimum: 5,
+      version: 1);
+
+  final bindings = <Type, EntityDefinition>{
+    Connection: EntityDefinition<Connection>(
+        model: _entities[0],
+        toOneRelations: (Connection object) => [],
+        toManyRelations: (Connection object) => {},
+        getId: (Connection object) => object.obId,
+        setId: (Connection object, int id) {
+          object.obId = id;
+        },
+        objectToFB: (Connection object, fb.Builder fbb) {
+          final nameOffset = fbb.writeString(object.name);
+          final handleOffset = fbb.writeString(object.handle);
+          final idOffset = fbb.writeString(object.id);
+          final networkOffset = fbb.writeString(object.network);
+          final profileUrlOffset = fbb.writeString(object.profileUrl);
+          final avatarUrlOffset = fbb.writeString(object.avatarUrl);
+          fbb.startTable(10);
+          fbb.addInt64(0, object.obId);
+          fbb.addOffset(1, nameOffset);
+          fbb.addOffset(2, handleOffset);
+          fbb.addOffset(3, idOffset);
+          fbb.addOffset(4, networkOffset);
+          fbb.addOffset(5, profileUrlOffset);
+          fbb.addOffset(6, avatarUrlOffset);
+          fbb.addInt64(7, object.dbStatus);
+          fbb.addInt64(8, object.lastUpdateTime.millisecondsSinceEpoch);
+          fbb.finish(fbb.endTable());
+          return object.obId;
+        },
+        objectFromFB: (Store store, ByteData fbData) {
+          final buffer = fb.BufferContext(fbData);
+          final rootOffset = buffer.derefObject(0);
+
+          final object = Connection(
+              obId: const fb.Int64Reader().vTableGet(buffer, rootOffset, 4, 0),
+              name: const fb.StringReader(asciiOptimization: true)
+                  .vTableGet(buffer, rootOffset, 6, ''),
+              handle: const fb.StringReader(asciiOptimization: true)
+                  .vTableGet(buffer, rootOffset, 8, ''),
+              id: const fb.StringReader(asciiOptimization: true)
+                  .vTableGet(buffer, rootOffset, 10, ''),
+              profileUrl: const fb.StringReader(asciiOptimization: true)
+                  .vTableGet(buffer, rootOffset, 14, ''),
+              network: const fb.StringReader(asciiOptimization: true)
+                  .vTableGet(buffer, rootOffset, 12, ''),
+              avatarUrl: const fb.StringReader(asciiOptimization: true)
+                  .vTableGet(buffer, rootOffset, 16, ''),
+              lastUpdateTime: DateTime.fromMillisecondsSinceEpoch(
+                  const fb.Int64Reader().vTableGet(buffer, rootOffset, 20, 0)))
+            ..dbStatus =
+                const fb.Int64Reader().vTableGet(buffer, rootOffset, 18, 0);
+
+          return object;
+        }),
+    Hashtag: EntityDefinition<Hashtag>(
+        model: _entities[1],
+        toOneRelations: (Hashtag object) => [],
+        toManyRelations: (Hashtag object) => {},
+        getId: (Hashtag object) => object.id,
+        setId: (Hashtag object, int id) {
+          object.id = id;
+        },
+        objectToFB: (Hashtag object, fb.Builder fbb) {
+          final tagOffset = fbb.writeString(object.tag);
+          final urlOffset = fbb.writeString(object.url);
+          fbb.startTable(5);
+          fbb.addInt64(0, object.id);
+          fbb.addOffset(1, tagOffset);
+          fbb.addOffset(2, urlOffset);
+          fbb.addInt64(3, object.lastUpdateTime.millisecondsSinceEpoch);
+          fbb.finish(fbb.endTable());
+          return object.id;
+        },
+        objectFromFB: (Store store, ByteData fbData) {
+          final buffer = fb.BufferContext(fbData);
+          final rootOffset = buffer.derefObject(0);
+
+          final object = Hashtag(
+              id: const fb.Int64Reader().vTableGet(buffer, rootOffset, 4, 0),
+              tag: const fb.StringReader(asciiOptimization: true)
+                  .vTableGet(buffer, rootOffset, 6, ''),
+              url: const fb.StringReader(asciiOptimization: true)
+                  .vTableGet(buffer, rootOffset, 8, ''))
+            ..lastUpdateTime = DateTime.fromMillisecondsSinceEpoch(
+                const fb.Int64Reader().vTableGet(buffer, rootOffset, 10, 0));
+
+          return object;
+        })
+  };
+
+  return ModelDefinition(model, bindings);
+}
+
+/// [Connection] entity fields to define ObjectBox queries.
+class Connection_ {
+  /// see [Connection.obId]
+  static final obId =
+      QueryIntegerProperty<Connection>(_entities[0].properties[0]);
+
+  /// see [Connection.name]
+  static final name =
+      QueryStringProperty<Connection>(_entities[0].properties[1]);
+
+  /// see [Connection.handle]
+  static final handle =
+      QueryStringProperty<Connection>(_entities[0].properties[2]);
+
+  /// see [Connection.id]
+  static final id = QueryStringProperty<Connection>(_entities[0].properties[3]);
+
+  /// see [Connection.network]
+  static final network =
+      QueryStringProperty<Connection>(_entities[0].properties[4]);
+
+  /// see [Connection.profileUrl]
+  static final profileUrl =
+      QueryStringProperty<Connection>(_entities[0].properties[5]);
+
+  /// see [Connection.avatarUrl]
+  static final avatarUrl =
+      QueryStringProperty<Connection>(_entities[0].properties[6]);
+
+  /// see [Connection.dbStatus]
+  static final dbStatus =
+      QueryIntegerProperty<Connection>(_entities[0].properties[7]);
+
+  /// see [Connection.lastUpdateTime]
+  static final lastUpdateTime =
+      QueryIntegerProperty<Connection>(_entities[0].properties[8]);
+}
+
+/// [Hashtag] entity fields to define ObjectBox queries.
+class Hashtag_ {
+  /// see [Hashtag.id]
+  static final id = QueryIntegerProperty<Hashtag>(_entities[1].properties[0]);
+
+  /// see [Hashtag.tag]
+  static final tag = QueryStringProperty<Hashtag>(_entities[1].properties[1]);
+
+  /// see [Hashtag.url]
+  static final url = QueryStringProperty<Hashtag>(_entities[1].properties[2]);
+
+  /// see [Hashtag.lastUpdateTime]
+  static final lastUpdateTime =
+      QueryIntegerProperty<Hashtag>(_entities[1].properties[3]);
+}
diff --git a/lib/serializers/friendica/connection_friendica_extensions.dart b/lib/serializers/friendica/connection_friendica_extensions.dart
index fa3f19a..8440808 100644
--- a/lib/serializers/friendica/connection_friendica_extensions.dart
+++ b/lib/serializers/friendica/connection_friendica_extensions.dart
@@ -14,7 +14,7 @@ extension ConnectionFriendicaExtensions on Connection {
         status: status,
         name: name,
         id: id,
-        profileUrl: profileUrl,
+        profileUrl: profileUrl.toString(),
         network: network);
   }
 }
diff --git a/lib/serializers/mastodon/connection_mastodon_extensions.dart b/lib/serializers/mastodon/connection_mastodon_extensions.dart
index 95e537d..b135dee 100644
--- a/lib/serializers/mastodon/connection_mastodon_extensions.dart
+++ b/lib/serializers/mastodon/connection_mastodon_extensions.dart
@@ -23,9 +23,9 @@ extension ConnectionMastodonExtensions on Connection {
       name: name,
       id: id,
       handle: handle,
-      profileUrl: profileUrl,
+      profileUrl: profileUrl.toString(),
       network: network,
-      avatarUrl: avatar,
+      avatarUrl: avatar.toString(),
     );
   }
 }
diff --git a/lib/serializers/mastodon/hashtag_mastodon_extensions.dart b/lib/serializers/mastodon/hashtag_mastodon_extensions.dart
new file mode 100644
index 0000000..b325584
--- /dev/null
+++ b/lib/serializers/mastodon/hashtag_mastodon_extensions.dart
@@ -0,0 +1,12 @@
+import '../../models/hashtag.dart';
+
+extension HashtagMastodonExtensions on Hashtag {
+  static Hashtag fromJson(Map<String, dynamic> json) {
+    final tag = json['name'];
+    final url = json['url'];
+    return Hashtag(
+      tag: tag,
+      url: url,
+    );
+  }
+}
diff --git a/lib/serializers/mastodon/timeline_entry_mastodon_extensions.dart b/lib/serializers/mastodon/timeline_entry_mastodon_extensions.dart
index 31e09f6..2522da9 100644
--- a/lib/serializers/mastodon/timeline_entry_mastodon_extensions.dart
+++ b/lib/serializers/mastodon/timeline_entry_mastodon_extensions.dart
@@ -10,6 +10,7 @@ import '../../services/connections_manager.dart';
 import '../../services/hashtag_service.dart';
 import '../../utils/dateutils.dart';
 import 'connection_mastodon_extensions.dart';
+import 'hashtag_mastodon_extensions.dart';
 
 final _logger = Logger('TimelineEntryMastodonExtensions');
 
@@ -75,9 +76,9 @@ extension TimelineEntryMastodonExtensions on TimelineEntry {
     final List<dynamic>? tags = json['tags'];
     if (tags?.isNotEmpty ?? false) {
       final tagManager = getIt<HashtagService>();
-      for (final tag in tags!) {
-        final tagName = tag['name'];
-        tagManager.addHashtage(tagName);
+      for (final tagJson in tags!) {
+        final tag = HashtagMastodonExtensions.fromJson(tagJson);
+        tagManager.add(tag);
       }
     }
 
diff --git a/lib/services/connections_manager.dart b/lib/services/connections_manager.dart
index 9e7ca19..09e7472 100644
--- a/lib/services/connections_manager.dart
+++ b/lib/services/connections_manager.dart
@@ -1,9 +1,12 @@
+import 'dart:collection';
 import 'dart:math';
 
 import 'package:flutter/material.dart';
 import 'package:logging/logging.dart';
 import 'package:result_monad/result_monad.dart';
 
+import '../data/interfaces/connections_repo_intf.dart';
+import '../data/interfaces/groups_repo.intf.dart';
 import '../globals.dart';
 import '../models/connection.dart';
 import '../models/exec_error.dart';
@@ -12,75 +15,28 @@ import 'auth_service.dart';
 
 class ConnectionsManager extends ChangeNotifier {
   static final _logger = Logger('$ConnectionsManager');
-  final _connectionsById = <String, Connection>{};
-  final _connectionsByName = <String, Connection>{};
-  final _connectionsByProfileUrl = <Uri, Connection>{};
-  final _groupsForConnection = <String, List<GroupData>>{};
-  final _myGroups = <GroupData>{};
-  final _myContacts = <Connection>[];
-  var _myContactsInitialized = false;
+  late final IConnectionsRepo conRepo;
+  late final IGroupsRepo groupsRepo;
 
-  int get length => _connectionsById.length;
-
-  void clearCaches() {
-    _connectionsById.clear();
-    _connectionsByName.clear();
-    _connectionsByProfileUrl.clear();
-    _groupsForConnection.clear();
-    _myGroups.clear();
-    _myContacts.clear();
+  ConnectionsManager() {
+    conRepo = getIt<IConnectionsRepo>();
+    groupsRepo = getIt<IGroupsRepo>();
   }
 
   bool addConnection(Connection connection) {
-    if (_connectionsById.containsKey(connection.id)) {
-      return false;
-    }
-    return updateConnection(connection);
+    return conRepo.addConnection(connection);
   }
 
   List<Connection> getKnownUsersByName(String name) {
-    return _connectionsByName.values.where((it) {
-      final normalizedHandle = it.handle.toLowerCase();
-      final normalizedName = it.name.toLowerCase();
-      final normalizedQuery = name.toLowerCase();
-      return normalizedHandle.contains(normalizedQuery) ||
-          normalizedName.contains(normalizedQuery);
-    }).toList();
+    return conRepo.getKnownUsersByName(name);
   }
 
   bool updateConnection(Connection connection) {
-    _connectionsById[connection.id] = connection;
-    _connectionsByName[connection.name] = connection;
-    _connectionsByProfileUrl[connection.profileUrl] = connection;
-    int index = _myContacts.indexWhere((c) => c.id == connection.id);
-    if (index >= 0) {
-      _myContacts.removeAt(index);
-    }
-    switch (connection.status) {
-      case ConnectionStatus.youFollowThem:
-      case ConnectionStatus.theyFollowYou:
-      case ConnectionStatus.mutual:
-        if (index > 0) {
-          _myContacts.insert(index, connection);
-        } else {
-          _myContacts.add(connection);
-        }
-        break;
-      default:
-        break;
-    }
-
-    return true;
+    return conRepo.updateConnection(connection);
   }
 
   bool addAllConnections(Iterable<Connection> newConnections) {
-    bool result = true;
-
-    for (final connection in newConnections) {
-      result &= addConnection(connection);
-    }
-
-    return result;
+    return conRepo.addAllConnections(newConnections);
   }
 
   Future<void> acceptFollowRequest(Connection connection) async {
@@ -179,12 +135,7 @@ class ConnectionsManager extends ChangeNotifier {
   }
 
   List<Connection> getMyContacts() {
-    if (!_myContactsInitialized) {
-      updateAllContacts();
-      _myContactsInitialized = true;
-    }
-
-    return _myContacts.toList(growable: false);
+    return conRepo.getMyContacts();
   }
 
   Future<void> updateAllContacts() async {
@@ -234,29 +185,34 @@ class ConnectionsManager extends ChangeNotifier {
       });
     }
 
-    _myContacts.clear();
-    _myContacts.addAll(results.values);
     addAllConnections(results.values);
-    _myContacts.sort((c1, c2) => c1.name.compareTo(c2.name));
-    _logger.finest('# Contacts:${_myContacts.length}');
+    final myContacts = conRepo.getMyContacts().toList();
+    myContacts.sort((c1, c2) => c1.name.compareTo(c2.name));
+    _logger.finest('# Contacts:${myContacts.length}');
     notifyListeners();
   }
 
   List<GroupData> getMyGroups() {
-    if (_myGroups.isNotEmpty) {
-      return _myGroups.toList(growable: false);
+    final myGroups = groupsRepo.getMyGroups();
+    if (myGroups.isEmpty) {
+      _updateMyGroups(true);
     }
-    _updateMyGroups(true);
-    return [];
+
+    return myGroups;
   }
 
   Result<List<GroupData>, ExecError> getGroupsForUser(String id) {
-    if (!_groupsForConnection.containsKey(id)) {
-      _refreshGroupListData(id, true);
-      return Result.ok([]);
+    final result = groupsRepo.getGroupsForUser(id);
+    if (result.isSuccess) {
+      return result;
     }
 
-    return Result.ok(_groupsForConnection[id]!);
+    if (result.isFailure && result.error.type != ErrorType.notFound) {
+      return result;
+    }
+
+    _refreshGroupListData(id, true);
+    return Result.ok(UnmodifiableListView([]));
   }
 
   FutureResult<bool, ExecError> addUserToGroup(
@@ -291,37 +247,22 @@ class ConnectionsManager extends ChangeNotifier {
     return result.execErrorCast();
   }
 
-  Result<Connection, String> getById(String id) {
-    final result = _connectionsById[id];
-    if (result == null) {
-      return Result.error('$id not found');
-    }
-    if (result.status == ConnectionStatus.unknown) {
-      _refreshConnection(result, true);
-    }
-    return Result.ok(result);
+  Result<Connection, ExecError> getById(String id) {
+    return conRepo.getById(id).andThenSuccess((c) {
+      if (c.status == ConnectionStatus.unknown) {
+        _refreshConnection(c, true);
+      }
+      return c;
+    }).execErrorCast();
   }
 
-  Result<Connection, String> getByName(String name) {
-    final result = _connectionsByName[name];
-    if (result == null) {
-      Result.error('$name not found');
-    }
-    if (result!.status == ConnectionStatus.unknown) {
-      _refreshConnection(result, true);
-    }
-    return Result.ok(result);
-  }
-
-  Result<Connection, String> getByProfileUrl(Uri url) {
-    final result = _connectionsByProfileUrl[url];
-    if (result == null) {
-      Result.error('$url not found');
-    }
-    if (result!.status == ConnectionStatus.unknown) {
-      _refreshConnection(result, true);
-    }
-    return Result.ok(result);
+  Result<Connection, ExecError> getByName(String name) {
+    return conRepo.getByName(name).andThenSuccess((c) {
+      if (c.status == ConnectionStatus.unknown) {
+        _refreshConnection(c, true);
+      }
+      return c;
+    }).execErrorCast();
   }
 
   Future<void> fullRefresh(Connection connection) async {
@@ -337,8 +278,8 @@ class ConnectionsManager extends ChangeNotifier {
         .currentClient
         .andThenAsync((client) => client.getMemberGroupsForConnection(id))
         .match(
-      onSuccess: (lists) {
-        _groupsForConnection[id] = lists;
+      onSuccess: (groups) {
+        groupsRepo.updateConnectionGroupData(id, groups);
         if (withNotification) {
           notifyListeners();
         }
@@ -376,8 +317,8 @@ class ConnectionsManager extends ChangeNotifier {
         .match(
       onSuccess: (groups) {
         _logger.finest('Got updated groups:${groups.map((e) => e.name)}');
-        _myGroups.clear();
-        _myGroups.addAll(groups);
+        groupsRepo.clearGroups();
+        groupsRepo.addAllGroups(groups);
         if (withNotification) {
           notifyListeners();
         }
diff --git a/lib/services/hashtag_service.dart b/lib/services/hashtag_service.dart
index 70fec9a..a9c6ea9 100644
--- a/lib/services/hashtag_service.dart
+++ b/lib/services/hashtag_service.dart
@@ -1,21 +1,22 @@
 import 'package:flutter/foundation.dart';
 
-class HashtagService extends ChangeNotifier {
-  final _hashTags = <String>{};
+import '../data/interfaces/hashtag_repo_intf.dart';
+import '../globals.dart';
+import '../models/hashtag.dart';
 
-  void clear() {
-    _hashTags.clear();
-    notifyListeners();
+class HashtagService extends ChangeNotifier {
+  late final IHashtagRepo repo;
+
+  HashtagService() {
+    repo = getIt<IHashtagRepo>();
   }
 
-  void addHashtage(String hashtag) {
-    _hashTags.add(hashtag);
+  void add(Hashtag tag) {
+    repo.add(tag);
     notifyListeners();
   }
 
   List<String> getMatchingHashTags(String searchString) {
-    return _hashTags
-        .where((tag) => tag.toLowerCase().contains(searchString.toLowerCase()))
-        .toList();
+    return repo.getMatchingHashTags(searchString);
   }
 }
diff --git a/linux/flutter/generated_plugin_registrant.cc b/linux/flutter/generated_plugin_registrant.cc
index 241dc8b..c1e3da3 100644
--- a/linux/flutter/generated_plugin_registrant.cc
+++ b/linux/flutter/generated_plugin_registrant.cc
@@ -8,6 +8,7 @@
 
 #include <desktop_window/desktop_window_plugin.h>
 #include <flutter_secure_storage_linux/flutter_secure_storage_linux_plugin.h>
+#include <objectbox_flutter_libs/objectbox_flutter_libs_plugin.h>
 #include <url_launcher_linux/url_launcher_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
@@ -17,6 +18,9 @@ void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) flutter_secure_storage_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "FlutterSecureStorageLinuxPlugin");
   flutter_secure_storage_linux_plugin_register_with_registrar(flutter_secure_storage_linux_registrar);
+  g_autoptr(FlPluginRegistrar) objectbox_flutter_libs_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "ObjectboxFlutterLibsPlugin");
+  objectbox_flutter_libs_plugin_register_with_registrar(objectbox_flutter_libs_registrar);
   g_autoptr(FlPluginRegistrar) url_launcher_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "UrlLauncherPlugin");
   url_launcher_plugin_register_with_registrar(url_launcher_linux_registrar);
diff --git a/linux/flutter/generated_plugins.cmake b/linux/flutter/generated_plugins.cmake
index fd2ab75..28dcfea 100644
--- a/linux/flutter/generated_plugins.cmake
+++ b/linux/flutter/generated_plugins.cmake
@@ -5,6 +5,7 @@
 list(APPEND FLUTTER_PLUGIN_LIST
   desktop_window
   flutter_secure_storage_linux
+  objectbox_flutter_libs
   url_launcher_linux
 )
 
diff --git a/macos/Flutter/GeneratedPluginRegistrant.swift b/macos/Flutter/GeneratedPluginRegistrant.swift
index 808f3fb..a3accbe 100644
--- a/macos/Flutter/GeneratedPluginRegistrant.swift
+++ b/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -7,6 +7,7 @@ import Foundation
 
 import desktop_window
 import flutter_secure_storage_macos
+import objectbox_flutter_libs
 import path_provider_macos
 import shared_preferences_foundation
 import sqflite
@@ -15,6 +16,7 @@ import url_launcher_macos
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   DesktopWindowPlugin.register(with: registry.registrar(forPlugin: "DesktopWindowPlugin"))
   FlutterSecureStoragePlugin.register(with: registry.registrar(forPlugin: "FlutterSecureStoragePlugin"))
+  ObjectboxFlutterLibsPlugin.register(with: registry.registrar(forPlugin: "ObjectboxFlutterLibsPlugin"))
   PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
   SqflitePlugin.register(with: registry.registrar(forPlugin: "SqflitePlugin"))
diff --git a/macos/Podfile.lock b/macos/Podfile.lock
index 4b4a807..fb1b443 100644
--- a/macos/Podfile.lock
+++ b/macos/Podfile.lock
@@ -7,6 +7,10 @@ PODS:
   - FMDB (2.7.5):
     - FMDB/standard (= 2.7.5)
   - FMDB/standard (2.7.5)
+  - ObjectBox (1.8.1-rc)
+  - objectbox_flutter_libs (0.0.1):
+    - FlutterMacOS
+    - ObjectBox (= 1.8.1-rc)
   - path_provider_macos (0.0.1):
     - FlutterMacOS
   - shared_preferences_foundation (0.0.1):
@@ -22,6 +26,7 @@ DEPENDENCIES:
   - desktop_window (from `Flutter/ephemeral/.symlinks/plugins/desktop_window/macos`)
   - flutter_secure_storage_macos (from `Flutter/ephemeral/.symlinks/plugins/flutter_secure_storage_macos/macos`)
   - FlutterMacOS (from `Flutter/ephemeral`)
+  - objectbox_flutter_libs (from `Flutter/ephemeral/.symlinks/plugins/objectbox_flutter_libs/macos`)
   - path_provider_macos (from `Flutter/ephemeral/.symlinks/plugins/path_provider_macos/macos`)
   - shared_preferences_foundation (from `Flutter/ephemeral/.symlinks/plugins/shared_preferences_foundation/macos`)
   - sqflite (from `Flutter/ephemeral/.symlinks/plugins/sqflite/macos`)
@@ -30,6 +35,7 @@ DEPENDENCIES:
 SPEC REPOS:
   trunk:
     - FMDB
+    - ObjectBox
 
 EXTERNAL SOURCES:
   desktop_window:
@@ -38,6 +44,8 @@ EXTERNAL SOURCES:
     :path: Flutter/ephemeral/.symlinks/plugins/flutter_secure_storage_macos/macos
   FlutterMacOS:
     :path: Flutter/ephemeral
+  objectbox_flutter_libs:
+    :path: Flutter/ephemeral/.symlinks/plugins/objectbox_flutter_libs/macos
   path_provider_macos:
     :path: Flutter/ephemeral/.symlinks/plugins/path_provider_macos/macos
   shared_preferences_foundation:
@@ -52,6 +60,8 @@ SPEC CHECKSUMS:
   flutter_secure_storage_macos: 75c8cadfdba05ca007c0fa4ea0c16e5cf85e521b
   FlutterMacOS: ae6af50a8ea7d6103d888583d46bd8328a7e9811
   FMDB: 2ce00b547f966261cd18927a3ddb07cb6f3db82a
+  ObjectBox: 7615cc462f2976cb45127d301a17cb473edf3f9e
+  objectbox_flutter_libs: 6c6e858d1df4a7cd5cb664c2108e6fa0b412be38
   path_provider_macos: 05fb0ef0cedf3e5bd179b9e41a638682b37133ea
   shared_preferences_foundation: 297b3ebca31b34ec92be11acd7fb0ba932c822ca
   sqflite: a5789cceda41d54d23f31d6de539d65bb14100ea
diff --git a/macos/Runner/Release.entitlements b/macos/Runner/Release.entitlements
index 225aa48..ef5d0fe 100644
--- a/macos/Runner/Release.entitlements
+++ b/macos/Runner/Release.entitlements
@@ -8,5 +8,9 @@
 	<true/>
 	<key>keychain-access-groups</key>
 	<array/>
+    <key>com.apple.security.application-groups</key>
+    <array>
+        <string>friendica_portal</string>
+    </array>
 </dict>
 </plist>
diff --git a/macos/Runner/RunnerDebug.entitlements b/macos/Runner/RunnerDebug.entitlements
index 1fbcb4e..2a0b6a2 100644
--- a/macos/Runner/RunnerDebug.entitlements
+++ b/macos/Runner/RunnerDebug.entitlements
@@ -12,5 +12,9 @@
 	<true/>
 	<key>keychain-access-groups</key>
 	<array/>
+    <key>com.apple.security.application-groups</key>
+    <array>
+        <string>friendica_portal</string>
+    </array>
 </dict>
 </plist>
diff --git a/pubspec.lock b/pubspec.lock
index 50f7094..b5c14b2 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,6 +1,20 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "50.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.2.0"
   archive:
     dependency: transitive
     description:
@@ -29,6 +43,62 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  build:
+    dependency: transitive
+    description:
+      name: build
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.1"
+  build_config:
+    dependency: transitive
+    description:
+      name: build_config
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.1"
+  build_daemon:
+    dependency: transitive
+    description:
+      name: build_daemon
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.0"
+  build_resolvers:
+    dependency: transitive
+    description:
+      name: build_resolvers
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  build_runner:
+    dependency: "direct dev"
+    description:
+      name: build_runner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.3"
+  build_runner_core:
+    dependency: transitive
+    description:
+      name: build_runner_core
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "7.2.7"
+  built_collection:
+    dependency: transitive
+    description:
+      name: built_collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.1.1"
+  built_value:
+    dependency: transitive
+    description:
+      name: built_value
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "8.4.3"
   cached_network_image:
     dependency: "direct main"
     description:
@@ -57,6 +127,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.1"
+  checked_yaml:
+    dependency: transitive
+    description:
+      name: checked_yaml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
   clock:
     dependency: transitive
     description:
@@ -64,6 +141,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.1"
+  code_builder:
+    dependency: transitive
+    description:
+      name: code_builder
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.4.0"
   collection:
     dependency: transitive
     description:
@@ -92,6 +176,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.2"
+  cryptography:
+    dependency: transitive
+    description:
+      name: cryptography
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.5"
   csslib:
     dependency: transitive
     description:
@@ -106,6 +197,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.5"
+  dart_style:
+    dependency: transitive
+    description:
+      name: dart_style
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.4"
   desktop_window:
     dependency: "direct main"
     description:
@@ -148,6 +246,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "5.2.5"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
+  flat_buffers:
+    dependency: transitive
+    description:
+      name: flat_buffers
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.5"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -261,6 +373,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.9.1"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.2.0"
   functional_listener:
     dependency: transitive
     description:
@@ -289,6 +408,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.1.4+2"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
   go_router:
     dependency: "direct main"
     description:
@@ -296,6 +422,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "5.2.4"
+  graphs:
+    dependency: transitive
+    description:
+      name: graphs
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
   html:
     dependency: transitive
     description:
@@ -310,6 +443,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.13.5"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.2.1"
   http_parser:
     dependency: transitive
     description:
@@ -359,6 +499,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.6.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   js:
     dependency: transitive
     description:
@@ -366,6 +513,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.6.4"
+  json_annotation:
+    dependency: transitive
+    description:
+      name: json_annotation
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.7.0"
   lints:
     dependency: transitive
     description:
@@ -415,6 +569,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.4.1"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
   multi_trigger_autocomplete:
     dependency: "direct main"
     description:
@@ -436,6 +597,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.0.1"
+  objectbox:
+    dependency: "direct main"
+    description:
+      name: objectbox
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.1"
+  objectbox_flutter_libs:
+    dependency: "direct main"
+    description:
+      name: objectbox_flutter_libs
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.1"
+  objectbox_generator:
+    dependency: "direct dev"
+    description:
+      name: objectbox_generator
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.1"
   octo_image:
     dependency: transitive
     description:
@@ -443,6 +625,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.2"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
   path:
     dependency: "direct main"
     description:
@@ -451,7 +640,7 @@ packages:
     source: hosted
     version: "1.8.2"
   path_provider:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: path_provider
       url: "https://pub.dartlang.org"
@@ -534,6 +723,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.6.2"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.1"
   process:
     dependency: transitive
     description:
@@ -548,6 +744,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.0.5"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
+  pubspec_parse:
+    dependency: transitive
+    description:
+      name: pubspec_parse
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.1"
   result_monad:
     dependency: "direct main"
     description:
@@ -618,11 +828,32 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.2"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.4.0"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
     version: "0.0.99"
+  source_gen:
+    dependency: transitive
+    description:
+      name: source_gen
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.6"
   source_span:
     dependency: transitive
     description:
@@ -644,6 +875,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.4.1"
+  sqlite3:
+    dependency: "direct main"
+    description:
+      name: sqlite3
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.9.1"
   stack_trace:
     dependency: transitive
     description:
@@ -658,6 +896,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
@@ -700,6 +945,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.9.17"
+  timing:
+    dependency: transitive
+    description:
+      name: timing
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   typed_data:
     dependency: transitive
     description:
@@ -812,6 +1064,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.13"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.0"
   win32:
     dependency: transitive
     description:
@@ -833,6 +1099,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.1.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.1"
 sdks:
   dart: ">=2.18.2 <3.0.0"
   flutter: ">=3.3.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 0ff792c..05b221d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -34,15 +34,21 @@ dependencies:
   result_monad: ^2.0.2
   scrollable_positioned_list: ^0.3.5
   shared_preferences: ^2.0.15
+  sqlite3: ^1.9.1
   time_machine: ^0.9.17
   url_launcher: ^6.1.6
   uuid: ^3.0.6
   video_player: ^2.4.10
+  objectbox: ^1.7.1
+  objectbox_flutter_libs: ^1.7.1
+  path_provider: ^2.0.11
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
   flutter_lints: ^2.0.0
+  build_runner: ^2.3.3
+  objectbox_generator: ^1.7.1
 
 flutter:
   uses-material-design: true
diff --git a/windows/flutter/generated_plugin_registrant.cc b/windows/flutter/generated_plugin_registrant.cc
index f50c00b..4c170c8 100644
--- a/windows/flutter/generated_plugin_registrant.cc
+++ b/windows/flutter/generated_plugin_registrant.cc
@@ -8,6 +8,7 @@
 
 #include <desktop_window/desktop_window_plugin.h>
 #include <flutter_secure_storage_windows/flutter_secure_storage_windows_plugin.h>
+#include <objectbox_flutter_libs/objectbox_flutter_libs_plugin.h>
 #include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
@@ -15,6 +16,8 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("DesktopWindowPlugin"));
   FlutterSecureStorageWindowsPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FlutterSecureStorageWindowsPlugin"));
+  ObjectboxFlutterLibsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("ObjectboxFlutterLibsPlugin"));
   UrlLauncherWindowsRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("UrlLauncherWindows"));
 }
diff --git a/windows/flutter/generated_plugins.cmake b/windows/flutter/generated_plugins.cmake
index ddb2474..5a12988 100644
--- a/windows/flutter/generated_plugins.cmake
+++ b/windows/flutter/generated_plugins.cmake
@@ -5,6 +5,7 @@
 list(APPEND FLUTTER_PLUGIN_LIST
   desktop_window
   flutter_secure_storage_windows
+  objectbox_flutter_libs
   url_launcher_windows
 )