diff --git a/lib/foundation/app.dart b/lib/foundation/app.dart
index 91b6509..d575d26 100644
--- a/lib/foundation/app.dart
+++ b/lib/foundation/app.dart
@@ -3,8 +3,11 @@ import 'dart:ui';
 
 import 'package:flutter/material.dart';
 import 'package:path_provider/path_provider.dart';
+import 'package:venera/foundation/history.dart';
 
 import 'appdata.dart';
+import 'favorites.dart';
+import 'local.dart';
 
 export "widget_utils.dart";
 export "context.dart";
@@ -51,6 +54,14 @@ class _App {
 
   BuildContext get rootContext => rootNavigatorKey.currentContext!;
 
+  final Appdata data = appdata;
+
+  final HistoryManager history = HistoryManager();
+
+  final LocalFavoritesManager favorites = LocalFavoritesManager();
+
+  final LocalManager local = LocalManager();
+
   void rootPop() {
     rootNavigatorKey.currentState?.maybePop();
   }
@@ -66,6 +77,10 @@ class _App {
   Future<void> init() async {
     cachePath = (await getApplicationCacheDirectory()).path;
     dataPath = (await getApplicationSupportDirectory()).path;
+    await data.init();
+    await history.init();
+    await favorites.init();
+    await local.init();
   }
 
   Function? _forceRebuildHandler;
diff --git a/lib/foundation/appdata.dart b/lib/foundation/appdata.dart
index a44c052..4b93e29 100644
--- a/lib/foundation/appdata.dart
+++ b/lib/foundation/appdata.dart
@@ -6,8 +6,8 @@ import 'package:venera/foundation/app.dart';
 import 'package:venera/utils/data_sync.dart';
 import 'package:venera/utils/io.dart';
 
-class _Appdata {
-  final _Settings settings = _Settings();
+class Appdata {
+  final Settings settings = Settings();
 
   var searchHistory = <String>[];
 
@@ -110,10 +110,10 @@ class _Appdata {
   }
 }
 
-final appdata = _Appdata();
+final appdata = Appdata();
 
-class _Settings with ChangeNotifier {
-  _Settings();
+class Settings with ChangeNotifier {
+  Settings();
 
   final _data = <String, dynamic>{
     'comicDisplayMode': 'detailed', // detailed, brief
diff --git a/lib/init.dart b/lib/init.dart
index 972d857..6f8bcda 100644
--- a/lib/init.dart
+++ b/lib/init.dart
@@ -4,10 +4,7 @@ import 'package:rhttp/rhttp.dart';
 import 'package:venera/foundation/app.dart';
 import 'package:venera/foundation/cache_manager.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
-import 'package:venera/foundation/favorites.dart';
-import 'package:venera/foundation/history.dart';
 import 'package:venera/foundation/js_engine.dart';
-import 'package:venera/foundation/local.dart';
 import 'package:venera/foundation/log.dart';
 import 'package:venera/network/cookie_jar.dart';
 import 'package:venera/pages/comic_source_page.dart';
@@ -32,25 +29,18 @@ extension _FutureInit<T> on Future<T> {
 }
 
 Future<void> init() async {
-  await Rhttp.init();
-  await SAFTaskWorker().init().wait();
-  await AppTranslation.init().wait();
-  await appdata.init().wait();
   await App.init().wait();
-  await HistoryManager().init().wait();
-  await TagsTranslation.readData().wait();
-  await LocalFavoritesManager().init().wait();
   SingleInstanceCookieJar("${App.dataPath}/cookie.db");
-  await JsEngine().init().wait();
-  await ComicSource.init().wait();
-  await LocalManager().init().wait();
+  var futures = [
+    Rhttp.init(),
+    SAFTaskWorker().init().wait(),
+    AppTranslation.init().wait(),
+    TagsTranslation.readData().wait(),
+    JsEngine().init().then((_) => ComicSource.init()).wait(),
+  ];
+  await Future.wait(futures);
   CacheManager().setLimitSize(appdata.settings['cacheSize']);
-  if (appdata.settings['searchSources'] == null) {
-    appdata.settings['searchSources'] = ComicSource.all()
-        .where((e) => e.searchPageData != null)
-        .map((e) => e.key)
-        .toList();
-  }
+  _checkOldConfigs();
   if (App.isAndroid) {
     handleLinks();
   }
@@ -59,6 +49,15 @@ Future<void> init() async {
   };
 }
 
+void _checkOldConfigs() {
+  if (appdata.settings['searchSources'] == null) {
+    appdata.settings['searchSources'] = ComicSource.all()
+        .where((e) => e.searchPageData != null)
+        .map((e) => e.key)
+        .toList();
+  }
+}
+
 Future<void> _checkAppUpdates() async {
   var lastCheck = appdata.implicitData['lastCheckUpdate'] ?? 0;
   var now = DateTime.now().millisecondsSinceEpoch;