diff --git a/apps/rebreak-native/app/_layout.tsx b/apps/rebreak-native/app/_layout.tsx
index 6978f2c..67c83ed 100644
--- a/apps/rebreak-native/app/_layout.tsx
+++ b/apps/rebreak-native/app/_layout.tsx
@@ -14,6 +14,8 @@ import {
   Nunito_800ExtraBold,
 } from '@expo-google-fonts/nunito';
 import { useAuthStore } from '../stores/auth';
+import { useThemeStore } from '../stores/theme';
+import { useLanguageStore } from '../stores/language';
 import { BrandSplash } from '../components/BrandSplash';
 import '../lib/i18n'; // i18next-Init via Side-Effect
 import '../global.css';
@@ -40,6 +42,8 @@ const queryClient = new QueryClient({
 
 function RootLayoutInner() {
   const { loading, init } = useAuthStore();
+  const initTheme = useThemeStore((s) => s.init);
+  const initLanguage = useLanguageStore((s) => s.init);
   const [fontsLoaded] = useFonts({
     Nunito_400Regular,
     Nunito_600SemiBold,
@@ -49,6 +53,8 @@ function RootLayoutInner() {
 
   useEffect(() => {
     init();
+    initTheme();
+    initLanguage();
   }, []);
 
   useEffect(() => {
diff --git a/apps/rebreak-native/app/settings.tsx b/apps/rebreak-native/app/settings.tsx
index 68b43c7..3b0fb14 100644
--- a/apps/rebreak-native/app/settings.tsx
+++ b/apps/rebreak-native/app/settings.tsx
@@ -1,12 +1,139 @@
-import { Alert, Platform, Pressable, ScrollView, Text, View } from 'react-native';
+import {
+  Alert,
+  Animated,
+  Modal,
+  Platform,
+  Pressable,
+  ScrollView,
+  Text,
+  View,
+} from 'react-native';
+import { useEffect, useRef, useState } from 'react';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
 import { useRouter } from 'expo-router';
 import { Ionicons } from '@expo/vector-icons';
 import { useTranslation } from 'react-i18next';
 import { colors } from '../lib/theme';
 import { useAuthStore } from '../stores/auth';
+import { useThemeStore, type ThemeMode } from '../stores/theme';
+import { useLanguageStore, type AppLanguage } from '../stores/language';
+import { useUserPlan } from '../hooks/useUserPlan';
 import { AppHeader } from '../components/AppHeader';
 
+// ─── Picker Sheet ──────────────────────────────────────────────────────────
+
+type PickerOption<T extends string> = { value: T; label: string };
+
+function PickerSheet<T extends string>({
+  visible,
+  title,
+  options,
+  selected,
+  onSelect,
+  onClose,
+}: {
+  visible: boolean;
+  title: string;
+  options: PickerOption<T>[];
+  selected: T;
+  onSelect: (v: T) => void;
+  onClose: () => void;
+}) {
+  const translateY = useRef(new Animated.Value(300)).current;
+
+  useEffect(() => {
+    if (visible) {
+      Animated.spring(translateY, {
+        toValue: 0,
+        useNativeDriver: true,
+        damping: 22,
+        stiffness: 280,
+      }).start();
+    } else {
+      Animated.timing(translateY, {
+        toValue: 300,
+        duration: 180,
+        useNativeDriver: true,
+      }).start();
+    }
+  }, [visible]);
+
+  return (
+    <Modal visible={visible} transparent animationType="none" onRequestClose={onClose}>
+      <Pressable
+        onPress={onClose}
+        style={{ flex: 1, backgroundColor: 'rgba(0,0,0,0.3)', justifyContent: 'flex-end' }}
+      >
+        <Animated.View
+          onStartShouldSetResponder={() => true}
+          style={{
+            backgroundColor: '#fff',
+            borderTopLeftRadius: 22,
+            borderTopRightRadius: 22,
+            paddingBottom: 34,
+            transform: [{ translateY }],
+          }}
+        >
+          <View
+            style={{
+              width: 36,
+              height: 4,
+              borderRadius: 2,
+              backgroundColor: '#e5e5e5',
+              alignSelf: 'center',
+              marginTop: 10,
+              marginBottom: 14,
+            }}
+          />
+          <Text
+            style={{
+              fontSize: 15,
+              fontFamily: 'Nunito_700Bold',
+              color: '#0a0a0a',
+              textAlign: 'center',
+              marginBottom: 12,
+            }}
+          >
+            {title}
+          </Text>
+          {options.map((opt) => (
+            <Pressable
+              key={opt.value}
+              onPress={() => {
+                onSelect(opt.value);
+                onClose();
+              }}
+              style={({ pressed }) => ({
+                flexDirection: 'row',
+                alignItems: 'center',
+                justifyContent: 'space-between',
+                paddingHorizontal: 20,
+                paddingVertical: 14,
+                backgroundColor: pressed ? '#f5f5f5' : 'transparent',
+              })}
+            >
+              <Text
+                style={{
+                  fontSize: 15,
+                  fontFamily: opt.value === selected ? 'Nunito_700Bold' : 'Nunito_400Regular',
+                  color: opt.value === selected ? colors.brandOrange : '#0a0a0a',
+                }}
+              >
+                {opt.label}
+              </Text>
+              {opt.value === selected && (
+                <Ionicons name="checkmark" size={18} color={colors.brandOrange} />
+              )}
+            </Pressable>
+          ))}
+        </Animated.View>
+      </Pressable>
+    </Modal>
+  );
+}
+
+// ─── Settings Screen ───────────────────────────────────────────────────────
+
 type SectionRow = {
   icon: React.ComponentProps<typeof Ionicons>['name'];
   iconColor: string;
@@ -14,6 +141,7 @@ type SectionRow = {
   sublabel: string;
   soon?: boolean;
   destructive?: boolean;
+  value?: string;
   onPress?: () => void;
 };
 
@@ -28,25 +156,63 @@ export default function SettingsScreen() {
   const insets = useSafeAreaInsets();
   const { t } = useTranslation();
   const { signOut } = useAuthStore();
+  const { mode: themeMode, setMode: setThemeMode } = useThemeStore();
+  const { language, setLanguage } = useLanguageStore();
+  const { plan } = useUserPlan();
+
+  const [themePickerOpen, setThemePickerOpen] = useState(false);
+  const [langPickerOpen, setLangPickerOpen] = useState(false);
+  const [voicePickerOpen, setVoicePickerOpen] = useState(false);
+
+  // Lyra Voice: hardcoded ElevenLabs voice IDs (expandable by user later)
+  // Backend endpoint PATCH /api/profile/me/demographics does NOT accept lyraVoiceId.
+  // A dedicated PATCH /api/profile/me/lyra-voice endpoint is needed from backend-agent.
+  // For now: picker is wired to local state only, changes are NOT persisted.
+  const [selectedVoice, setSelectedVoice] = useState('EXAVITQu4vr4xnSDxMaL');
 
   async function handleSignOut() {
-    Alert.alert(
-      t('auth.signOut'),
-      '',
-      [
-        { text: t('common.cancel'), style: 'cancel' },
-        {
-          text: t('auth.signOut'),
-          style: 'destructive',
-          onPress: async () => {
-            await signOut();
-            router.replace('/');
-          },
+    Alert.alert(t('auth.signOut'), '', [
+      { text: t('common.cancel'), style: 'cancel' },
+      {
+        text: t('auth.signOut'),
+        style: 'cancel',
+        onPress: async () => {
+          await signOut();
+          router.replace('/');
         },
-      ],
-    );
+      },
+    ]);
   }
 
+  const themeOptions: PickerOption<ThemeMode>[] = [
+    { value: 'system', label: t('settings.theme_system') },
+    { value: 'light', label: t('settings.theme_light') },
+    { value: 'dark', label: t('settings.theme_dark') },
+  ];
+
+  const themeLabel =
+    themeMode === 'system'
+      ? t('settings.theme_system')
+      : themeMode === 'light'
+        ? t('settings.theme_light')
+        : t('settings.theme_dark');
+
+  const langOptions: PickerOption<AppLanguage>[] = [
+    { value: 'de', label: t('settings.language_de') },
+    { value: 'en', label: t('settings.language_en') },
+  ];
+
+  const voiceOptions: PickerOption<string>[] = [
+    { value: 'EXAVITQu4vr4xnSDxMaL', label: t('settings.lyra_voice_sarah') },
+    { value: 'ThT5KcBeYPX3keUQqHPh', label: t('settings.lyra_voice_aria') },
+    { value: 'XB0fDUnXU5powFXDhCwa', label: t('settings.lyra_voice_charlotte') },
+    { value: 'Xb7hH8MSUJpSbSDYk0k2', label: t('settings.lyra_voice_alice') },
+    { value: 'pqHfZKP75CvOlQylNhV4', label: t('settings.lyra_voice_bill') },
+  ];
+
+  const selectedVoiceName =
+    voiceOptions.find((v) => v.value === selectedVoice)?.label ?? t('settings.lyra_voice_sarah');
+
   const sections: Section[] = [
     {
       key: 'profile',
@@ -77,14 +243,16 @@ export default function SettingsScreen() {
           iconColor: '#a78bfa',
           label: t('settings.theme'),
           sublabel: t('settings.theme_desc'),
-          soon: true,
+          value: themeLabel,
+          onPress: () => setThemePickerOpen(true),
         },
         {
           icon: 'language-outline',
           iconColor: '#a78bfa',
           label: t('settings.language'),
           sublabel: t('settings.language_desc'),
-          soon: true,
+          value: language === 'de' ? t('settings.language_de') : t('settings.language_en'),
+          onPress: () => setLangPickerOpen(true),
         },
       ],
     },
@@ -136,8 +304,15 @@ export default function SettingsScreen() {
           icon: 'mic-outline',
           iconColor: '#ec4899',
           label: t('settings.lyra_voice'),
-          sublabel: t('settings.lyra_voice_desc'),
-          soon: true,
+          sublabel:
+            plan === 'legend'
+              ? t('settings.lyra_voice_desc')
+              : t('settings.lyra_voice_only_legend'),
+          value: plan === 'legend' ? selectedVoiceName : undefined,
+          // Voice picker is wired but changes are local-only until
+          // PATCH /api/profile/me/lyra-voice endpoint is added by backend-agent.
+          onPress: plan === 'legend' ? () => setVoicePickerOpen(true) : undefined,
+          soon: plan !== 'legend',
         },
       ],
     },
@@ -200,38 +375,6 @@ export default function SettingsScreen() {
         }}
         showsVerticalScrollIndicator={false}
       >
-        <View
-          style={{
-            backgroundColor: '#fef3c7',
-            borderRadius: 14,
-            padding: 14,
-            marginBottom: 20,
-            borderWidth: 1,
-            borderColor: '#fde68a',
-            flexDirection: 'row',
-            gap: 10,
-            alignItems: 'flex-start',
-          }}
-        >
-          <Ionicons name="construct-outline" size={18} color="#b45309" style={{ marginTop: 1 }} />
-          <View style={{ flex: 1 }}>
-            <Text style={{ fontSize: 14, fontFamily: 'Nunito_700Bold', color: '#78350f' }}>
-              {t('settings.coming_soon_title')}
-            </Text>
-            <Text
-              style={{
-                fontSize: 12,
-                fontFamily: 'Nunito_400Regular',
-                color: '#92400e',
-                marginTop: 4,
-                lineHeight: 17,
-              }}
-            >
-              {t('settings.coming_soon_desc')}
-            </Text>
-          </View>
-        </View>
-
         {sections.map((section) => (
           <View key={section.key} style={{ marginBottom: 24 }}>
             <Text
@@ -326,6 +469,19 @@ export default function SettingsScreen() {
                     >
                       {t('settings.soon_badge')}
                     </Text>
+                  ) : row.value ? (
+                    <Text
+                      style={{
+                        fontSize: 13,
+                        color: colors.textMuted,
+                        fontFamily: 'Nunito_400Regular',
+                        flexShrink: 0,
+                        marginLeft: 4,
+                      }}
+                      numberOfLines={1}
+                    >
+                      {row.value}
+                    </Text>
                   ) : (
                     <Ionicons
                       name="chevron-forward"
@@ -365,6 +521,33 @@ export default function SettingsScreen() {
           {Platform.OS}
         </Text>
       </ScrollView>
+
+      <PickerSheet
+        visible={themePickerOpen}
+        title={t('settings.theme_picker_title')}
+        options={themeOptions}
+        selected={themeMode}
+        onSelect={setThemeMode}
+        onClose={() => setThemePickerOpen(false)}
+      />
+
+      <PickerSheet
+        visible={langPickerOpen}
+        title={t('settings.language_picker_title')}
+        options={langOptions}
+        selected={language}
+        onSelect={setLanguage}
+        onClose={() => setLangPickerOpen(false)}
+      />
+
+      <PickerSheet
+        visible={voicePickerOpen}
+        title={t('settings.lyra_voice_picker_title')}
+        options={voiceOptions}
+        selected={selectedVoice}
+        onSelect={setSelectedVoice}
+        onClose={() => setVoicePickerOpen(false)}
+      />
     </View>
   );
 }
diff --git a/apps/rebreak-native/components/header/HeaderDropdownMenu.tsx b/apps/rebreak-native/components/header/HeaderDropdownMenu.tsx
index 4a7adab..9510c95 100644
--- a/apps/rebreak-native/components/header/HeaderDropdownMenu.tsx
+++ b/apps/rebreak-native/components/header/HeaderDropdownMenu.tsx
@@ -100,7 +100,7 @@ export function HeaderDropdownMenu({ visible, onClose, topOffset = 80 }: Props)
               shadowOpacity: 0.18,
               shadowRadius: 20,
               elevation: 12,
-              minWidth: 280,
+              minWidth: 170,
               overflow: 'hidden',
             }}
           >
@@ -190,6 +190,7 @@ export function HeaderDropdownMenu({ visible, onClose, topOffset = 80 }: Props)
                     style={{ marginRight: 14 }}
                   />
                   <Text
+                    numberOfLines={1}
                     style={{
                       fontSize: 14,
                       fontFamily: 'Nunito_600SemiBold',
@@ -227,6 +228,7 @@ export function HeaderDropdownMenu({ visible, onClose, topOffset = 80 }: Props)
                   style={{ marginRight: 14 }}
                 />
                 <Text
+                  numberOfLines={1}
                   style={{
                     fontSize: 14,
                     fontFamily: 'Nunito_600SemiBold',
diff --git a/apps/rebreak-native/locales/de.json b/apps/rebreak-native/locales/de.json
index fc40e5e..75a7ad0 100644
--- a/apps/rebreak-native/locales/de.json
+++ b/apps/rebreak-native/locales/de.json
@@ -449,6 +449,20 @@
     "section_lyra": "Lyra (Legend)",
     "lyra_voice": "Lyra-Stimme",
     "lyra_voice_desc": "Voice-Picker — verfügbar im Legend-Plan",
+    "lyra_voice_only_legend": "Nur im Legend-Plan verfügbar",
+    "theme_picker_title": "Theme wählen",
+    "theme_system": "System",
+    "theme_light": "Hell",
+    "theme_dark": "Dunkel",
+    "language_picker_title": "Sprache wählen",
+    "language_de": "Deutsch",
+    "language_en": "English",
+    "lyra_voice_picker_title": "Lyra-Stimme wählen",
+    "lyra_voice_sarah": "Sarah (warm)",
+    "lyra_voice_aria": "Aria (ruhig)",
+    "lyra_voice_charlotte": "Charlotte (klar)",
+    "lyra_voice_alice": "Alice (nüchtern)",
+    "lyra_voice_bill": "Bill (tief)",
     "section_debug": "Debug",
     "debug_llm": "LLM-Provider",
     "debug_llm_desc": "Modell & Prompt-Tuning (DEV)",
diff --git a/apps/rebreak-native/locales/en.json b/apps/rebreak-native/locales/en.json
index b5b5569..513c111 100644
--- a/apps/rebreak-native/locales/en.json
+++ b/apps/rebreak-native/locales/en.json
@@ -449,6 +449,20 @@
     "section_lyra": "Lyra (Legend)",
     "lyra_voice": "Lyra voice",
     "lyra_voice_desc": "Voice picker — Legend-plan exclusive",
+    "lyra_voice_only_legend": "Legend plan only",
+    "theme_picker_title": "Choose theme",
+    "theme_system": "System",
+    "theme_light": "Light",
+    "theme_dark": "Dark",
+    "language_picker_title": "Choose language",
+    "language_de": "Deutsch",
+    "language_en": "English",
+    "lyra_voice_picker_title": "Choose Lyra voice",
+    "lyra_voice_sarah": "Sarah (warm)",
+    "lyra_voice_aria": "Aria (calm)",
+    "lyra_voice_charlotte": "Charlotte (clear)",
+    "lyra_voice_alice": "Alice (neutral)",
+    "lyra_voice_bill": "Bill (deep)",
     "section_debug": "Debug",
     "debug_llm": "LLM provider",
     "debug_llm_desc": "Model & prompt tuning (DEV)",
diff --git a/apps/rebreak-native/stores/language.ts b/apps/rebreak-native/stores/language.ts
new file mode 100644
index 0000000..ac9aed5
--- /dev/null
+++ b/apps/rebreak-native/stores/language.ts
@@ -0,0 +1,30 @@
+import { create } from 'zustand';
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import i18n from '../lib/i18n';
+
+export type AppLanguage = 'de' | 'en';
+
+const STORAGE_KEY = '@rebreak/language';
+
+type LanguageState = {
+  language: AppLanguage;
+  setLanguage: (lang: AppLanguage) => Promise<void>;
+  init: () => Promise<void>;
+};
+
+export const useLanguageStore = create<LanguageState>((set) => ({
+  language: (i18n.language === 'de' ? 'de' : 'en') as AppLanguage,
+
+  init: async () => {
+    const stored = await AsyncStorage.getItem(STORAGE_KEY);
+    const lang: AppLanguage = stored === 'de' || stored === 'en' ? stored : 'en';
+    await i18n.changeLanguage(lang);
+    set({ language: lang });
+  },
+
+  setLanguage: async (lang) => {
+    await AsyncStorage.setItem(STORAGE_KEY, lang);
+    await i18n.changeLanguage(lang);
+    set({ language: lang });
+  },
+}));
diff --git a/apps/rebreak-native/stores/theme.ts b/apps/rebreak-native/stores/theme.ts
new file mode 100644
index 0000000..99a8e94
--- /dev/null
+++ b/apps/rebreak-native/stores/theme.ts
@@ -0,0 +1,38 @@
+import { create } from 'zustand';
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import { Appearance } from 'react-native';
+
+export type ThemeMode = 'system' | 'light' | 'dark';
+
+const STORAGE_KEY = '@rebreak/theme';
+
+function resolveColorScheme(mode: ThemeMode): 'light' | 'dark' {
+  if (mode === 'system') {
+    return Appearance.getColorScheme() === 'dark' ? 'dark' : 'light';
+  }
+  return mode;
+}
+
+type ThemeState = {
+  mode: ThemeMode;
+  colorScheme: 'light' | 'dark';
+  setMode: (mode: ThemeMode) => Promise<void>;
+  init: () => Promise<void>;
+};
+
+export const useThemeStore = create<ThemeState>((set) => ({
+  mode: 'system',
+  colorScheme: resolveColorScheme('system'),
+
+  init: async () => {
+    const stored = await AsyncStorage.getItem(STORAGE_KEY);
+    const mode: ThemeMode =
+      stored === 'light' || stored === 'dark' || stored === 'system' ? stored : 'system';
+    set({ mode, colorScheme: resolveColorScheme(mode) });
+  },
+
+  setMode: async (mode) => {
+    await AsyncStorage.setItem(STORAGE_KEY, mode);
+    set({ mode, colorScheme: resolveColorScheme(mode) });
+  },
+}));