diff --git a/app/lib/controller/pref_controller.dart b/app/lib/controller/pref_controller.dart
index 2f7536d9..fb36e01b 100644
--- a/app/lib/controller/pref_controller.dart
+++ b/app/lib/controller/pref_controller.dart
@@ -427,6 +427,9 @@ class PrefController {
                   .map(PrefHomeCollectionsNavButton.fromJson)
                   .toList()) ??
           _homeCollectionsNavBarButtonsDefault);
+  @npSubjectAccessor
+  late final _isAutoUpdateCheckAvailableController =
+      BehaviorSubject.seeded(pref.isAutoUpdateCheckAvailableOr(false));
 }
 
 extension PrefControllerExtension on PrefController {
diff --git a/app/lib/controller/pref_controller.g.dart b/app/lib/controller/pref_controller.g.dart
index 5da6d873..dc180940 100644
--- a/app/lib/controller/pref_controller.g.dart
+++ b/app/lib/controller/pref_controller.g.dart
@@ -266,6 +266,15 @@ extension $PrefControllerNpSubjectAccessor on PrefController {
           homeCollectionsNavBarButtons.distinct().skip(1);
   List<PrefHomeCollectionsNavButton> get homeCollectionsNavBarButtonsValue =>
       _homeCollectionsNavBarButtonsController.value;
+// _isAutoUpdateCheckAvailableController
+  ValueStream<bool> get isAutoUpdateCheckAvailable =>
+      _isAutoUpdateCheckAvailableController.stream;
+  Stream<bool> get isAutoUpdateCheckAvailableNew =>
+      isAutoUpdateCheckAvailable.skip(1);
+  Stream<bool> get isAutoUpdateCheckAvailableChange =>
+      isAutoUpdateCheckAvailable.distinct().skip(1);
+  bool get isAutoUpdateCheckAvailableValue =>
+      _isAutoUpdateCheckAvailableController.value;
 }
 
 extension $SecurePrefControllerNpSubjectAccessor on SecurePrefController {
diff --git a/app/lib/entity/pref.dart b/app/lib/entity/pref.dart
index 11a35d9a..386ccf42 100644
--- a/app/lib/entity/pref.dart
+++ b/app/lib/entity/pref.dart
@@ -120,6 +120,9 @@ enum PrefKey implements PrefKeyInterface {
   homeCollectionsNavBarButtons,
   lastDonationDialogTime,
   shouldRemindDonationLater,
+  lastAutoUpdateCheckTime,
+  isAutoUpdateCheckAvailable,
+  isEnableAutoUpdateCheck,
   ;
 
   @override
@@ -224,6 +227,12 @@ enum PrefKey implements PrefKeyInterface {
         return "lastDonationDialogTime";
       case PrefKey.shouldRemindDonationLater:
         return "shouldRemindDonationLater";
+      case PrefKey.lastAutoUpdateCheckTime:
+        return "lastAutoUpdateCheckTime";
+      case PrefKey.isAutoUpdateCheckAvailable:
+        return "isAutoUpdateCheckAvailable";
+      case PrefKey.isEnableAutoUpdateCheck:
+        return "isEnableAutoUpdateCheck";
     }
   }
 }
diff --git a/app/lib/entity/pref/extension.dart b/app/lib/entity/pref/extension.dart
index 5b46ec75..4477a711 100644
--- a/app/lib/entity/pref/extension.dart
+++ b/app/lib/entity/pref/extension.dart
@@ -183,6 +183,33 @@ extension PrefExtension on Pref {
       PrefKey.shouldRemindDonationLater,
       value,
       (key, value) => provider.setBool(key, value));
+
+  int? getLastAutoUpdateCheckTime() =>
+      provider.getInt(PrefKey.lastAutoUpdateCheckTime);
+  int getLastAutoUpdateCheckTimeOr(int def) =>
+      getLastAutoUpdateCheckTime() ?? def;
+  Future<bool> setLastAutoUpdateCheckTime(int value) => _set<int>(
+      PrefKey.lastAutoUpdateCheckTime,
+      value,
+      (key, value) => provider.setInt(key, value));
+
+  bool? isAutoUpdateCheckAvailable() =>
+      provider.getBool(PrefKey.isAutoUpdateCheckAvailable);
+  bool isAutoUpdateCheckAvailableOr([bool def = false]) =>
+      isAutoUpdateCheckAvailable() ?? def;
+  Future<bool> setIsAutoUpdateCheckAvailable(bool value) => _set<bool>(
+      PrefKey.isAutoUpdateCheckAvailable,
+      value,
+      (key, value) => provider.setBool(key, value));
+
+  bool? isEnableAutoUpdateCheck() =>
+      provider.getBool(PrefKey.isEnableAutoUpdateCheck);
+  bool isEnableAutoUpdateCheckOr([bool def = true]) =>
+      isEnableAutoUpdateCheck() ?? def;
+  Future<bool> setIsEnableAutoUpdateCheck(bool value) => _set<bool>(
+      PrefKey.isEnableAutoUpdateCheck,
+      value,
+      (key, value) => provider.setBool(key, value));
 }
 
 extension AccountPrefExtension on AccountPref {
diff --git a/app/lib/update_checker.dart b/app/lib/update_checker.dart
index facc088f..6bb47d91 100644
--- a/app/lib/update_checker.dart
+++ b/app/lib/update_checker.dart
@@ -1,8 +1,11 @@
+import 'dart:async';
 import 'dart:convert';
 
 import 'package:http/http.dart' as http;
 import 'package:logging/logging.dart';
+import 'package:nc_photos/entity/pref.dart';
 import 'package:nc_photos/k.dart' as k;
+import 'package:nc_photos/object_extension.dart';
 
 enum UpdateCheckerResult {
   updateAvailable,
@@ -51,3 +54,40 @@ class UpdateChecker {
 
   static final _log = Logger("update_checker.UpdateChecker");
 }
+
+class AutoUpdateChecker {
+  const AutoUpdateChecker();
+
+  Future<void> call() async {
+    try {
+      if (Pref().isAutoUpdateCheckAvailableOr()) {
+        return;
+      }
+
+      final prev = Pref().getLastAutoUpdateCheckTime()?.run(
+              (obj) => DateTime.fromMillisecondsSinceEpoch(obj).toUtc()) ??
+          DateTime(0);
+      final now = DateTime.now().toUtc();
+      if (now.isAfter(prev) && now.difference(prev) > const Duration(days: 7)) {
+        unawaited(
+          Pref().setLastAutoUpdateCheckTime(now.millisecondsSinceEpoch),
+        );
+        await _check();
+      }
+    } catch (e, stackTrace) {
+      _log.severe("[call] Exception", e, stackTrace);
+    }
+  }
+
+  Future<void> _check() async {
+    _log.info("[_check] Auto update check");
+    final checker = UpdateChecker();
+    final result = await checker();
+    if (result == UpdateCheckerResult.updateAvailable) {
+      _log.info("[_check] New update available");
+      unawaited(Pref().setIsAutoUpdateCheckAvailable(true));
+    }
+  }
+
+  static final _log = Logger("update_checker.AutoUpdateChecker");
+}
diff --git a/app/lib/widget/home_app_bar.dart b/app/lib/widget/home_app_bar.dart
index be705374..a1ada04c 100644
--- a/app/lib/widget/home_app_bar.dart
+++ b/app/lib/widget/home_app_bar.dart
@@ -5,6 +5,7 @@ import 'package:nc_photos/account.dart';
 import 'package:nc_photos/api/api_util.dart' as api_util;
 import 'package:nc_photos/controller/account_controller.dart';
 import 'package:nc_photos/controller/account_pref_controller.dart';
+import 'package:nc_photos/controller/pref_controller.dart';
 import 'package:nc_photos/stream_util.dart';
 import 'package:nc_photos/theme.dart';
 import 'package:nc_photos/widget/account_picker_dialog.dart';
@@ -53,15 +54,48 @@ class HomeSliverAppBar extends StatelessWidget {
               }
             },
           ),
-        _ProfileIconView(
-          account: account,
-          isProcessing: isShowProgressIcon,
-          onTap: () {
-            showDialog(
-              context: context,
-              builder: (_) => const AccountPickerDialog(),
-            );
-          },
+        Stack(
+          fit: StackFit.passthrough,
+          children: [
+            _ProfileIconView(
+              account: account,
+              isProcessing: isShowProgressIcon,
+              onTap: () {
+                showDialog(
+                  context: context,
+                  builder: (_) => const AccountPickerDialog(),
+                );
+              },
+            ),
+            ValueStreamBuilder(
+              stream: context.read<PrefController>().isAutoUpdateCheckAvailable,
+              builder: (context, snapshot) {
+                final isAutoUpdateCheckAvailable = snapshot.requireData;
+                if (isAutoUpdateCheckAvailable) {
+                  return Positioned.directional(
+                    textDirection: Directionality.of(context),
+                    end: 0,
+                    top: 0,
+                    child: Container(
+                      width: 12,
+                      height: 12,
+                      decoration: BoxDecoration(
+                        borderRadius: BorderRadius.circular(8),
+                        color: Colors.red,
+                      ),
+                      child: const Icon(
+                        Icons.upload,
+                        color: Colors.white,
+                        size: 12,
+                      ),
+                    ),
+                  );
+                } else {
+                  return const SizedBox.shrink();
+                }
+              },
+            ),
+          ],
         ),
         const SizedBox(width: 8),
       ],
diff --git a/app/lib/widget/settings.dart b/app/lib/widget/settings.dart
index 6d74b8f3..df543f54 100644
--- a/app/lib/widget/settings.dart
+++ b/app/lib/widget/settings.dart
@@ -6,6 +6,7 @@ import 'package:logging/logging.dart';
 import 'package:nc_photos/app_localizations.dart';
 import 'package:nc_photos/controller/pref_controller.dart';
 import 'package:nc_photos/debug_util.dart';
+import 'package:nc_photos/entity/pref.dart';
 import 'package:nc_photos/help_utils.dart' as help_util;
 import 'package:nc_photos/k.dart' as k;
 import 'package:nc_photos/language_util.dart' as language_util;
@@ -13,6 +14,7 @@ import 'package:nc_photos/mobile/platform.dart'
     if (dart.library.html) 'package:nc_photos/web/platform.dart' as platform;
 import 'package:nc_photos/platform/features.dart' as features;
 import 'package:nc_photos/platform/notification.dart';
+import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/stream_util.dart';
 import 'package:nc_photos/url_launcher_util.dart';
 import 'package:nc_photos/widget/list_tile_center_leading.dart';
@@ -48,6 +50,12 @@ class Settings extends StatefulWidget {
 
 @npLog
 class _SettingsState extends State<Settings> {
+  @override
+  void initState() {
+    super.initState();
+    _isEnableAutoUpdateCheck = Pref().isEnableAutoUpdateCheckOr();
+  }
+
   @override
   Widget build(BuildContext context) {
     final translator = L10n.global().translator;
@@ -148,11 +156,34 @@ class _SettingsState extends State<Settings> {
                   },
                 ),
                 ListTile(
+                  trailing: Pref().isAutoUpdateCheckAvailableOr()
+                      ? Stack(
+                          fit: StackFit.passthrough,
+                          children: [
+                            const Icon(Icons.upload),
+                            Positioned.directional(
+                              textDirection: Directionality.of(context),
+                              end: 0,
+                              top: 0,
+                              child: const Icon(
+                                Icons.circle,
+                                color: Colors.red,
+                                size: 8,
+                              ),
+                            ),
+                          ],
+                        )
+                      : null,
                   title: const Text("Check for updates"),
                   onTap: () {
                     Navigator.of(context).pushNamed(UpdateChecker.routeName);
                   },
                 ),
+                SwitchListTile(
+                  title: const Text("Check for updates automatically"),
+                  value: _isEnableAutoUpdateCheck,
+                  onChanged: _onEnableAutoUpdateCheckChanged,
+                ),
                 ListTile(
                   title: Text(L10n.global().settingsSourceCodeTitle),
                   onTap: () {
@@ -237,6 +268,37 @@ class _SettingsState extends State<Settings> {
     }
   }
 
+  Future<void> _onEnableAutoUpdateCheckChanged(bool value) async {
+    _log.info("[_onEnableAutoUpdateCheckChanged] New value: $value");
+    final oldValue = _isEnableAutoUpdateCheck;
+    setState(() {
+      _isEnableAutoUpdateCheck = value;
+    });
+    if (!await Pref().setIsEnableAutoUpdateCheck(value)) {
+      _log.severe("[_onEnableAutoUpdateCheckChanged] Failed writing pref");
+      SnackBarManager().showSnackBar(SnackBar(
+        content: Text(L10n.global().writePreferenceFailureNotification),
+        duration: k.snackBarDurationNormal,
+      ));
+      setState(() {
+        _isEnableAutoUpdateCheck = oldValue;
+      });
+    } else {
+      if (!value) {
+        // reset state after disabling
+        if (mounted) {
+          setState(() {
+            Pref()
+              ..setIsAutoUpdateCheckAvailable(false)
+              ..setLastAutoUpdateCheckTime(0);
+          });
+        }
+      }
+    }
+  }
+
+  late bool _isEnableAutoUpdateCheck;
+
   var _devSettingsUnlockCount = 3;
   var _isShowDevSettings = false;
 
diff --git a/app/lib/widget/splash.dart b/app/lib/widget/splash.dart
index 6773f644..b448bbcb 100644
--- a/app/lib/widget/splash.dart
+++ b/app/lib/widget/splash.dart
@@ -9,10 +9,12 @@ import 'package:nc_photos/app_localizations.dart';
 import 'package:nc_photos/bloc_util.dart';
 import 'package:nc_photos/controller/pref_controller.dart';
 import 'package:nc_photos/db/entity_converter.dart';
+import 'package:nc_photos/entity/pref.dart';
 import 'package:nc_photos/k.dart' as k;
 import 'package:nc_photos/mobile/android/activity.dart';
 import 'package:nc_photos/mobile/android/permission_util.dart';
 import 'package:nc_photos/protected_page_handler.dart';
+import 'package:nc_photos/update_checker.dart';
 import 'package:nc_photos/use_case/compat/v29.dart';
 import 'package:nc_photos/use_case/compat/v46.dart';
 import 'package:nc_photos/use_case/compat/v55.dart';
diff --git a/app/lib/widget/splash/bloc.dart b/app/lib/widget/splash/bloc.dart
index 071f69e9..14377ff3 100644
--- a/app/lib/widget/splash/bloc.dart
+++ b/app/lib/widget/splash/bloc.dart
@@ -28,6 +28,9 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
       _initFirstRun(),
       _migrateApp(emit),
     ]);
+    if (Pref().isEnableAutoUpdateCheckOr()) {
+      unawaited(const AutoUpdateChecker()());
+    }
     emit(state.copyWith(isDone: true));
   }
 
@@ -50,6 +53,7 @@ class _Bloc extends Bloc<_Event, _State> with BlocLogger {
 
   Future<void> _migrateApp(Emitter<_State> emit) async {
     if (_shouldUpgrade()) {
+      unawaited(Pref().setIsAutoUpdateCheckAvailable(false));
       await _handleUpgrade(emit);
     }
   }