diff --git a/carry-your-live/app/(tabs)/settings.tsx b/carry-your-live/app/(tabs)/settings.tsx
index 8112adc..c24f068 100644
--- a/carry-your-live/app/(tabs)/settings.tsx
+++ b/carry-your-live/app/(tabs)/settings.tsx
@@ -74,7 +74,9 @@ export default function SettingsScreen() {
     loadSettingsFromServer,
   } = useSettings();
   const categories = useCategories();
-  const [picker, setPicker] = useState<null | 'category' | 'sort' | 'reminder' | 'todoAhead'>(null);
+  const [picker, setPicker] = useState<
+    null | 'category' | 'sort' | 'reminder' | 'todoAhead' | 'themeMode'
+  >(null);
   const [reminderTagPicker, setReminderTagPicker] = useState<Category | null>(null);
   const [editingCategory, setEditingCategory] = useState<Category | null | 'new'>(null);
   const [syncVisible, setSyncVisible] = useState(false);
@@ -245,7 +247,7 @@ export default function SettingsScreen() {
           rightElement={
             <Switch
               value={notifications}
-              onValueChange={async (value) => {
+              onValueChange={async value => {
                 setNotifications(value);
                 if (!value) {
                   const { cancelAllReminders } = await import('@/services/notifications');
@@ -358,6 +360,15 @@ export default function SettingsScreen() {
           onPress={openCustomAccent}
           showChevron
         />
+        <Text style={[styles.sectionHint, { color: theme.textFaint }]}>Theme</Text>
+        <ListItem
+          title="Theme Mode"
+          subtitle={
+            themeMode === 'system' ? 'System default' : themeMode === 'dark' ? 'Dark' : 'Light'
+          }
+          onPress={() => setPicker('themeMode')}
+          showChevron
+        />
         <Text style={[styles.sectionTitle, { color: theme.textMuted }]}>Data</Text>
         <SyncStatus />
         <ListItem
@@ -366,6 +377,32 @@ export default function SettingsScreen() {
           onPress={() => setSyncVisible(true)}
           showChevron
         />
+        <ListItem
+          title="Sync Settings to Server"
+          subtitle="Push local settings to backend"
+          onPress={async () => {
+            try {
+              await syncSettingsToServer();
+              Alert.alert('Success', 'Settings synced to server');
+            } catch {
+              Alert.alert('Error', 'Failed to sync settings');
+            }
+          }}
+          showChevron
+        />
+        <ListItem
+          title="Load Settings from Server"
+          subtitle="Pull settings from backend"
+          onPress={async () => {
+            try {
+              await loadSettingsFromServer();
+              Alert.alert('Success', 'Settings loaded from server');
+            } catch {
+              Alert.alert('Error', 'Failed to load settings');
+            }
+          }}
+          showChevron
+        />
         <ListItem
           title="Friends"
           subtitle="Manage friends and requests"
@@ -444,6 +481,15 @@ export default function SettingsScreen() {
         onClose={() => setPicker(null)}
       />
 
+      <OptionPickerModal
+        visible={picker === 'themeMode'}
+        title="Theme Mode"
+        options={THEME_MODE_OPTIONS}
+        selectedValue={themeMode}
+        onSelect={value => setThemeMode(value as ThemeMode)}
+        onClose={() => setPicker(null)}
+      />
+
       <CategoryEditorModal
         visible={editorVisible}
         category={editorCategory}
@@ -551,6 +597,12 @@ const AHEAD_OPTIONS: { value: string; label: string }[] = Array.from({ length: 2
   label: i === 0 ? 'Only today' : `${i} day${i === 1 ? '' : 's'}`,
 }));
 
+const THEME_MODE_OPTIONS: { value: ThemeMode; label: string }[] = [
+  { value: 'light', label: 'Light' },
+  { value: 'dark', label: 'Dark' },
+  { value: 'system', label: 'System default' },
+];
+
 function formatSyncTime(timestamp: number): string {
   const seconds = Math.floor((Date.now() - timestamp) / 1000);
   if (seconds < 60) return 'just now';
diff --git a/carry-your-live/src/services/notifications.ts b/carry-your-live/src/services/notifications.ts
index 65eefff..20eb413 100644
--- a/carry-your-live/src/services/notifications.ts
+++ b/carry-your-live/src/services/notifications.ts
@@ -285,4 +285,4 @@ export async function rescheduleAllReminders(
 export function useNotificationSettings() {
   const { notifications, reminderPreference } = useSettings();
   return { notificationsEnabled: notifications, globalReminderPreference: reminderPreference };
-}
\ No newline at end of file
+}
diff --git a/carry-your-live/src/theme.tsx b/carry-your-live/src/theme.tsx
index e790a68..b3f0045 100644
--- a/carry-your-live/src/theme.tsx
+++ b/carry-your-live/src/theme.tsx
@@ -1,4 +1,12 @@
-import React, { createContext, useCallback, useContext, useEffect, useMemo, useState, ReactNode } from 'react';
+import React, {
+  createContext,
+  useCallback,
+  useContext,
+  useEffect,
+  useMemo,
+  useState,
+  ReactNode,
+} from 'react';
 import AsyncStorage from '@react-native-async-storage/async-storage';
 import { DEFAULT_API_BASE_URL, API_URL_KEY } from '@/services/auth';
 import { Platform } from 'react-native';
@@ -110,10 +118,15 @@ function accentTextColor(accent: string): string {
   return luminance > 0.5 ? '#111111' : '#FFFFFF';
 }
 
-export function colors(accent: string = DEFAULT_ACCENT, mode: ThemeMode = 'dark', opacity: number = 1): ThemeColors {
+export function colors(
+  accent: string = DEFAULT_ACCENT,
+  mode: ThemeMode = 'dark',
+  opacity: number = 1
+): ThemeColors {
   const softAccent = desaturate(accent, 0.35);
-  const accentWithOpacity = opacity < 1 ? `${opacity.toString(16).padStart(2, '0')}${accent.slice(1)}` : accent;
-  
+  const accentWithOpacity =
+    opacity < 1 ? `${opacity.toString(16).padStart(2, '0')}${accent.slice(1)}` : accent;
+
   if (mode === 'light') {
     return {
       background: '#FFFFFF',
@@ -144,7 +157,7 @@ export function colors(accent: string = DEFAULT_ACCENT, mode: ThemeMode = 'dark'
       info: '#1E88E5',
     };
   }
-  
+
   // dark mode
   return {
     background: '#121212',
@@ -289,34 +302,52 @@ export function SettingsProvider({ children }: { children: ReactNode }) {
     STORAGE_KEYS.reminderPreference,
     '15'
   );
-  const [tagReminderPreferences, setTagReminderPreferences] = useStoredSetting<TagReminderPreferences>(
-    STORAGE_KEYS.tagReminderPreferences,
-    {}
-  );
+  const [tagReminderPreferences, setTagReminderPreferences] =
+    useStoredSetting<TagReminderPreferences>(STORAGE_KEYS.tagReminderPreferences, {});
   const [apiUrl, setApiUrl] = useStoredSetting<string>(API_URL_KEY, DEFAULT_API_BASE_URL);
-  const [accentColor, setAccentColor] = useStoredSetting<string>(STORAGE_KEYS.accentColor, DEFAULT_ACCENT);
-  const [accentOpacity, setAccentOpacity] = useStoredSetting<number>(STORAGE_KEYS.accentOpacity, DEFAULT_ACCENT_OPACITY);
-  const [todoAheadDays, setTodoAheadDays] = useStoredSetting<number>(STORAGE_KEYS.todoAheadDays, DEFAULT_TODO_AHEAD_DAYS);
-  const [showCompleted, setShowCompleted] = useStoredSetting<boolean>(STORAGE_KEYS.showCompleted, false);
-  const [deleteBySwipe, setDeleteBySwipe] = useStoredSetting<boolean>(STORAGE_KEYS.deleteBySwipe, false);
+  const [accentColor, setAccentColor] = useStoredSetting<string>(
+    STORAGE_KEYS.accentColor,
+    DEFAULT_ACCENT
+  );
+  const [accentOpacity, setAccentOpacity] = useStoredSetting<number>(
+    STORAGE_KEYS.accentOpacity,
+    DEFAULT_ACCENT_OPACITY
+  );
+  const [todoAheadDays, setTodoAheadDays] = useStoredSetting<number>(
+    STORAGE_KEYS.todoAheadDays,
+    DEFAULT_TODO_AHEAD_DAYS
+  );
+  const [showCompleted, setShowCompleted] = useStoredSetting<boolean>(
+    STORAGE_KEYS.showCompleted,
+    false
+  );
+  const [deleteBySwipe, setDeleteBySwipe] = useStoredSetting<boolean>(
+    STORAGE_KEYS.deleteBySwipe,
+    false
+  );
   const [themeMode, setThemeMode, themeModeLoaded] = useStoredSetting<ThemeMode>(
     STORAGE_KEYS.themeMode,
     'system'
   );
 
-  const effectiveMode = themeMode === 'system' 
-    ? (Platform.OS === 'web' ? 'dark' : 'dark') // Will be updated by useColorScheme in real app
-    : themeMode;
+  const effectiveMode: 'light' | 'dark' =
+    themeMode === 'system'
+      ? 'dark' // Will be updated by useColorScheme in real app
+      : themeMode;
 
-  const theme = useMemo(() => colors(accentColor, effectiveMode, accentOpacity), [accentColor, effectiveMode, accentOpacity]);
+  const theme = useMemo(
+    () => colors(accentColor, effectiveMode, accentOpacity),
+    [accentColor, effectiveMode, accentOpacity]
+  );
 
   const syncSettingsToServer = useCallback(async () => {
     const { getAuthToken } = await import('@/services/auth');
     const token = await getAuthToken();
     if (!token) return;
-    
+
+    const isDark = effectiveMode === 'dark';
     const settings = {
-      darkMode: effectiveMode === 'dark' || (themeMode === 'system' && effectiveMode === 'dark'),
+      darkMode: isDark,
       defaultCategoryId,
       sortOrder: sortBy,
       reminderPreference,
@@ -325,13 +356,23 @@ export function SettingsProvider({ children }: { children: ReactNode }) {
       deleteBySwipe,
     };
     await pushServerSettings(apiUrl, token, settings);
-  }, [apiUrl, effectiveMode, themeMode, defaultCategoryId, sortBy, reminderPreference, todoAheadDays, showCompleted, deleteBySwipe]);
+  }, [
+    apiUrl,
+    effectiveMode,
+    themeMode,
+    defaultCategoryId,
+    sortBy,
+    reminderPreference,
+    todoAheadDays,
+    showCompleted,
+    deleteBySwipe,
+  ]);
 
   const loadSettingsFromServer = useCallback(async () => {
     const { getAuthToken } = await import('@/services/auth');
     const token = await getAuthToken();
     if (!token) return;
-    
+
     const serverSettings = await fetchServerSettings(apiUrl, token);
     if (!serverSettings) return;
 
@@ -344,7 +385,16 @@ export function SettingsProvider({ children }: { children: ReactNode }) {
     if (serverSettings.todoAheadDays !== undefined) setTodoAheadDays(serverSettings.todoAheadDays);
     if (serverSettings.showCompleted !== undefined) setShowCompleted(serverSettings.showCompleted);
     if (serverSettings.deleteBySwipe !== undefined) setDeleteBySwipe(serverSettings.deleteBySwipe);
-  }, [apiUrl, setThemeMode, setDefaultCategoryId, setSortBy, setReminderPreference, setTodoAheadDays, setShowCompleted, setDeleteBySwipe]);
+  }, [
+    apiUrl,
+    setThemeMode,
+    setDefaultCategoryId,
+    setSortBy,
+    setReminderPreference,
+    setTodoAheadDays,
+    setShowCompleted,
+    setDeleteBySwipe,
+  ]);
 
   const value = useMemo<SettingsContextType>(
     () => ({
@@ -407,11 +457,7 @@ export function SettingsProvider({ children }: { children: ReactNode }) {
     ]
   );
 
-  return (
-    <SettingsContext.Provider value={value}>
-      {children}
-    </SettingsContext.Provider>
-  );
+  return <SettingsContext.Provider value={value}>{children}</SettingsContext.Provider>;
 }
 
 export function useSettings() {
@@ -422,4 +468,4 @@ export function useSettings() {
   return context;
 }
 
-export * from './theme/tokens';
\ No newline at end of file
+export * from './theme/tokens';