diff --git a/src/build/template.html b/src/build/template.html
index fe8fc5f1..7a64aea9 100644
--- a/src/build/template.html
+++ b/src/build/template.html
@@ -11,7 +11,10 @@
   <link id='theManifest' rel='manifest' href='/manifest.json' >
   <link id='theFavicon' rel='icon' type='image/png' href='/favicon.png' >
   <link rel="apple-touch-icon" href="/apple-icon.png" >
+  <!-- both of these *-web-app-capable are required, for Chrome on Android and Safari on iOS
+       https://developers.google.com/web/fundamentals/native-hardware/fullscreen/ -->
   <meta name="mobile-web-app-capable" content="yes" >
+  <meta name="apple-mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-title" content="Pinafore" >
   <meta name="apple-mobile-web-app-status-bar-style" content="white" >