diff --git a/lib/components/home/syncing_button.dart b/lib/components/home/syncing_button.dart
index bfd58b360..64e313482 100644
--- a/lib/components/home/syncing_button.dart
+++ b/lib/components/home/syncing_button.dart
@@ -2,6 +2,7 @@ import 'dart:async';
 
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:saber/components/notifs/snackbar.dart';
 import 'package:saber/components/theming/adaptive_icon.dart';
 import 'package:saber/data/nextcloud/saber_syncer.dart';
 import 'package:saber/data/prefs.dart';
@@ -46,6 +47,11 @@ class _SyncingButtonState extends State<SyncingButton> {
     if (mounted) setState(() {});
   }
 
+  void _snackBarSyncOnlyOverWifi() {
+    if (!mounted) return;
+    SnackBarNotification.show(context, message: 'Wifi is not connected, disable "sync only over wifi" in settings to use mobile data.'); // fixme
+  }
+
   /// Returns a value between 0-1 representing the progress of the sync,
   /// or null if we're still refreshing.
   double? getPercentage() {
@@ -60,9 +66,14 @@ class _SyncingButtonState extends State<SyncingButton> {
     return filesTransferred / (filesTransferred + numPending);
   }
 
-  void onPressed() {
+  void onPressed() async {
     assert(Prefs.loggedIn);
 
+    if (!(await SaberSyncInterface.shouldSync())) {
+      _snackBarSyncOnlyOverWifi();
+      return;
+    }
+
     // Don't refresh if we're already refreshing.
     if (syncer.downloader.isRefreshing) return;
 
diff --git a/lib/components/notifs/snackbar.dart b/lib/components/notifs/snackbar.dart
new file mode 100644
index 000000000..0837f8e0d
--- /dev/null
+++ b/lib/components/notifs/snackbar.dart
@@ -0,0 +1,25 @@
+import 'package:flutter/material.dart';
+
+class SnackBarNotification extends StatelessWidget {
+  final String message;
+
+  const SnackBarNotification({
+    super.key,
+    required this.message,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return SnackBar(
+      content: Text(message),
+    );
+  }
+
+  static void show(BuildContext context, {required String message}) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(message),
+      ),
+    );
+  }
+}
diff --git a/lib/components/settings/nextcloud_profile.dart b/lib/components/settings/nextcloud_profile.dart
index 653633c8a..dafa00ca8 100644
--- a/lib/components/settings/nextcloud_profile.dart
+++ b/lib/components/settings/nextcloud_profile.dart
@@ -4,6 +4,7 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:nextcloud/provisioning_api.dart';
+import 'package:saber/components/notifs/snackbar.dart';
 import 'package:saber/components/theming/adaptive_icon.dart';
 import 'package:saber/data/file_manager/file_manager.dart';
 import 'package:saber/data/nextcloud/nextcloud_client_extension.dart';
@@ -52,6 +53,19 @@ class _NextcloudProfileState extends State<NextcloudProfile> {
     if (mounted) setState(() {});
   }
 
+  void _resyncEverything() async {
+    Prefs.fileSyncResyncEverythingDate.value = DateTime.now();
+    final allFiles = await FileManager.getAllFiles(includeExtensions: true, includeAssets: true);
+    for (final file in allFiles) {
+      syncer.uploader.enqueueRel(file);
+    }
+  }
+
+  void _snackBarSyncOnlyOverWifi() {
+    if (!mounted) return;
+    SnackBarNotification.show(context, message: 'Wifi is not connected, disable "sync only over wifi" in settings to use mobile data.'); // fixme
+  }
+
   @override
   Widget build(BuildContext context) {
     final loginStep =
@@ -71,6 +85,7 @@ class _NextcloudProfileState extends State<NextcloudProfile> {
     };
 
     var colorScheme = Theme.of(context).colorScheme;
+
     return ListTile(
       onTap: () => context.push(RoutePaths.login),
       leading: ValueListenableBuilder(
@@ -140,12 +155,11 @@ class _NextcloudProfileState extends State<NextcloudProfile> {
                   ),
                   tooltip: t.settings.resyncEverything,
                   onPressed: () async {
-                    Prefs.fileSyncResyncEverythingDate.value = DateTime.now();
-                    final allFiles = await FileManager.getAllFiles(
-                        includeExtensions: true, includeAssets: true);
-                    for (final file in allFiles) {
-                      syncer.uploader.enqueueRel(file);
+                    if (!(await SaberSyncInterface.shouldSync())) {
+                      _snackBarSyncOnlyOverWifi();
+                      return;
                     }
+                    _resyncEverything();
                   },
                 ),
               ],
diff --git a/lib/data/nextcloud/saber_syncer.dart b/lib/data/nextcloud/saber_syncer.dart
index 1ca8315ab..8784df32e 100644
--- a/lib/data/nextcloud/saber_syncer.dart
+++ b/lib/data/nextcloud/saber_syncer.dart
@@ -2,6 +2,7 @@ import 'dart:convert';
 import 'dart:io';
 
 import 'package:abstract_sync/abstract_sync.dart';
+import 'package:connectivity_plus/connectivity_plus.dart';
 import 'package:encrypt/encrypt.dart';
 import 'package:flutter/foundation.dart';
 import 'package:logging/logging.dart';
@@ -22,6 +23,16 @@ class SaberSyncInterface
     extends AbstractSyncInterface<SaberSyncFile, File, WebDavFile> {
   const SaberSyncInterface();
 
+  static Future<bool> shouldSync() async {
+    if (Prefs.onlySyncOverWifi.value) {
+      final List<ConnectivityResult> connRes = await Connectivity().checkConnectivity();
+      if (!connRes.contains(ConnectivityResult.wifi)) {
+        return false;
+      }
+    }
+    return true;
+  }
+
   static final log = Logger('SaberSyncInterface');
 
   @override
diff --git a/lib/data/prefs.dart b/lib/data/prefs.dart
index bd68bd968..925ce0deb 100644
--- a/lib/data/prefs.dart
+++ b/lib/data/prefs.dart
@@ -62,6 +62,7 @@ abstract class Prefs {
 
   static late final PlainPref<Uint8List?> pfp;
   static late final PlainPref<bool> syncInBackground;
+  static late final PlainPref<bool> onlySyncOverWifi;
 
   static late final PlainPref<ThemeMode> appTheme;
 
@@ -168,6 +169,7 @@ abstract class Prefs {
 
     pfp = PlainPref('pfp', null);
     syncInBackground = PlainPref('syncInBackground', true);
+    onlySyncOverWifi = PlainPref('onlySyncOverWifi', true);
 
     appTheme = PlainPref('appTheme', ThemeMode.system);
     platform = PlainPref('platform', defaultTargetPlatform);
diff --git a/lib/main_common.dart b/lib/main_common.dart
index fb3affc93..b1351f8cc 100644
--- a/lib/main_common.dart
+++ b/lib/main_common.dart
@@ -159,7 +159,10 @@ void setupBackgroundSync() {
 }
 
 @pragma('vm:entry-point')
-void doBackgroundSync() {
+void doBackgroundSync() async {
+  if (!(await SaberSyncInterface.shouldSync())) {
+    return; // FIXME: should we warn user in this case?
+  }
   Workmanager().executeTask((_, __) async {
     StrokeOptionsExtension.setDefaults();
     Prefs.init();
diff --git a/lib/pages/editor/editor.dart b/lib/pages/editor/editor.dart
index b53bcd237..503ee0fa3 100644
--- a/lib/pages/editor/editor.dart
+++ b/lib/pages/editor/editor.dart
@@ -21,6 +21,7 @@ import 'package:saber/components/canvas/canvas_preview.dart';
 import 'package:saber/components/canvas/image/editor_image.dart';
 import 'package:saber/components/canvas/save_indicator.dart';
 import 'package:saber/components/navbar/responsive_navbar.dart';
+import 'package:saber/components/notifs/snackbar.dart';
 import 'package:saber/components/theming/adaptive_alert_dialog.dart';
 import 'package:saber/components/theming/adaptive_icon.dart';
 import 'package:saber/components/theming/dynamic_material_app.dart';
@@ -1722,9 +1723,7 @@ class EditorState extends State<Editor> {
 
   void snackBarNeedsToSaveBeforeExiting() {
     if (!mounted) return;
-    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
-      content: Text(t.editor.needsToSaveBeforeExiting),
-    ));
+    SnackBarNotification.show(context, message: t.editor.needsToSaveBeforeExiting);
   }
 
   Widget bottomSheet(BuildContext context) {
diff --git a/lib/pages/home/settings.dart b/lib/pages/home/settings.dart
index a934940c3..47a5065ca 100644
--- a/lib/pages/home/settings.dart
+++ b/lib/pages/home/settings.dart
@@ -329,6 +329,15 @@ class _SettingsPageState extends State<SettingsPage> {
                 },
                 pref: Prefs.hyperlegibleFont,
               ),
+              SettingsSwitch(
+                title: 'Sync notes only over WiFi',
+                subtitle: 'If disabled mobile data may be used to sync notes',
+                iconBuilder: (i) => switch (Prefs.platform.value) {
+                  TargetPlatform.iOS || TargetPlatform.macOS => Icons.wifi_rounded,
+                  _ => Icons.wifi_sharp,
+                },
+                pref: Prefs.onlySyncOverWifi,
+              ),
               SettingsSubtitle(subtitle: t.settings.prefCategories.writing),
               SettingsSwitch(
                 title: t.settings.prefLabels.preferGreyscale,
diff --git a/macos/Flutter/GeneratedPluginRegistrant.swift b/macos/Flutter/GeneratedPluginRegistrant.swift
index a37a01931..c10df1d54 100644
--- a/macos/Flutter/GeneratedPluginRegistrant.swift
+++ b/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -6,6 +6,7 @@ import FlutterMacOS
 import Foundation
 
 import audioplayers_darwin
+import connectivity_plus
 import desktop_webview_window
 import device_info_plus
 import dynamic_color
@@ -14,7 +15,8 @@ import flutter_web_auth_2
 import irondash_engine_context
 import path_provider_foundation
 import printing
-import screen_retriever
+import quill_native_bridge_macos
+import screen_retriever_macos
 import share_plus
 import shared_preferences_foundation
 import super_native_extensions
@@ -24,6 +26,7 @@ import window_to_front
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   AudioplayersDarwinPlugin.register(with: registry.registrar(forPlugin: "AudioplayersDarwinPlugin"))
+  ConnectivityPlusPlugin.register(with: registry.registrar(forPlugin: "ConnectivityPlusPlugin"))
   DesktopWebviewWindowPlugin.register(with: registry.registrar(forPlugin: "DesktopWebviewWindowPlugin"))
   DeviceInfoPlusMacosPlugin.register(with: registry.registrar(forPlugin: "DeviceInfoPlusMacosPlugin"))
   DynamicColorPlugin.register(with: registry.registrar(forPlugin: "DynamicColorPlugin"))
@@ -32,7 +35,8 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   IrondashEngineContextPlugin.register(with: registry.registrar(forPlugin: "IrondashEngineContextPlugin"))
   PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
   PrintingPlugin.register(with: registry.registrar(forPlugin: "PrintingPlugin"))
-  ScreenRetrieverPlugin.register(with: registry.registrar(forPlugin: "ScreenRetrieverPlugin"))
+  QuillNativeBridgePlugin.register(with: registry.registrar(forPlugin: "QuillNativeBridgePlugin"))
+  ScreenRetrieverMacosPlugin.register(with: registry.registrar(forPlugin: "ScreenRetrieverMacosPlugin"))
   SharePlusMacosPlugin.register(with: registry.registrar(forPlugin: "SharePlusMacosPlugin"))
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
   SuperNativeExtensionsPlugin.register(with: registry.registrar(forPlugin: "SuperNativeExtensionsPlugin"))
diff --git a/pubspec.lock b/pubspec.lock
index 4c8ba515d..25ae91500 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -217,6 +217,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.18.0"
+  connectivity_plus:
+    dependency: "direct main"
+    description:
+      name: connectivity_plus
+      sha256: "876849631b0c7dc20f8b471a2a03142841b482438e3b707955464f5ffca3e4c3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.0"
+  connectivity_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: connectivity_plus_platform_interface
+      sha256: "42657c1715d48b167930d5f34d00222ac100475f73d10162ddf43e714932f204"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   convert:
     dependency: transitive
     description:
@@ -917,6 +933,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "8.1.0"
+  nm:
+    dependency: transitive
+    description:
+      name: nm
+      sha256: "2c9aae4127bdc8993206464fcc063611e0e36e72018696cd9631023a31b24254"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.0"
   one_dollar_unistroke_recognizer:
     dependency: "direct main"
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index f9e1a2636..ca0be541a 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -144,6 +144,7 @@ dependencies:
   args: ^2.5.0
 
   flutter_web_auth_2: ^4.0.0
+  connectivity_plus: ^6.0.5
 
   pdfrx: ^1.0.85
 
diff --git a/windows/flutter/generated_plugin_registrant.cc b/windows/flutter/generated_plugin_registrant.cc
index df63b981f..02e7ce019 100644
--- a/windows/flutter/generated_plugin_registrant.cc
+++ b/windows/flutter/generated_plugin_registrant.cc
@@ -7,13 +7,14 @@
 #include "generated_plugin_registrant.h"
 
 #include <audioplayers_windows/audioplayers_windows_plugin.h>
+#include <connectivity_plus/connectivity_plus_windows_plugin.h>
 #include <desktop_webview_window/desktop_webview_window_plugin.h>
 #include <dynamic_color/dynamic_color_plugin_c_api.h>
 #include <flutter_secure_storage_windows/flutter_secure_storage_windows_plugin.h>
 #include <irondash_engine_context/irondash_engine_context_plugin_c_api.h>
 #include <permission_handler_windows/permission_handler_windows_plugin.h>
 #include <printing/printing_plugin.h>
-#include <screen_retriever/screen_retriever_plugin.h>
+#include <screen_retriever_windows/screen_retriever_windows_plugin_c_api.h>
 #include <share_plus/share_plus_windows_plugin_c_api.h>
 #include <super_native_extensions/super_native_extensions_plugin_c_api.h>
 #include <url_launcher_windows/url_launcher_windows.h>
@@ -23,6 +24,8 @@
 void RegisterPlugins(flutter::PluginRegistry* registry) {
   AudioplayersWindowsPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("AudioplayersWindowsPlugin"));
+  ConnectivityPlusWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("ConnectivityPlusWindowsPlugin"));
   DesktopWebviewWindowPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("DesktopWebviewWindowPlugin"));
   DynamicColorPluginCApiRegisterWithRegistrar(
@@ -35,8 +38,8 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("PermissionHandlerWindowsPlugin"));
   PrintingPluginRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("PrintingPlugin"));
-  ScreenRetrieverPluginRegisterWithRegistrar(
-      registry->GetRegistrarForPlugin("ScreenRetrieverPlugin"));
+  ScreenRetrieverWindowsPluginCApiRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("ScreenRetrieverWindowsPluginCApi"));
   SharePlusWindowsPluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("SharePlusWindowsPluginCApi"));
   SuperNativeExtensionsPluginCApiRegisterWithRegistrar(
diff --git a/windows/flutter/generated_plugins.cmake b/windows/flutter/generated_plugins.cmake
index 4b5296f67..6b9caaa7f 100644
--- a/windows/flutter/generated_plugins.cmake
+++ b/windows/flutter/generated_plugins.cmake
@@ -4,13 +4,14 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   audioplayers_windows
+  connectivity_plus
   desktop_webview_window
   dynamic_color
   flutter_secure_storage_windows
   irondash_engine_context
   permission_handler_windows
   printing
-  screen_retriever
+  screen_retriever_windows
   share_plus
   super_native_extensions
   url_launcher_windows