diff --git a/app/App.tsx b/app/App.tsx
index d0f9db1..cf07ae6 100644
--- a/app/App.tsx
+++ b/app/App.tsx
@@ -2,15 +2,18 @@ import React from 'react';
 import { StatusBar } from 'expo-status-bar';
 import { SafeAreaProvider } from 'react-native-safe-area-context';
 import { AuthProvider } from '@/auth/AuthContext';
+import { ThemeProvider } from '@/theme/ThemeContext';
 import { RootNavigator } from '@/navigation/RootNavigator';
 
 export default function App() {
   return (
     <SafeAreaProvider>
-      <AuthProvider>
-        <RootNavigator />
-        <StatusBar style="auto" />
-      </AuthProvider>
+      <ThemeProvider>
+        <AuthProvider>
+          <RootNavigator />
+          <StatusBar style="auto" />
+        </AuthProvider>
+      </ThemeProvider>
     </SafeAreaProvider>
   );
 }
diff --git a/app/app.json b/app/app.json
index 83b4399..3660e48 100644
--- a/app/app.json
+++ b/app/app.json
@@ -44,7 +44,8 @@
     "extra": {
       "psEnvironment": "prodv2",
       "mapStyleUrl": "https://tiles.openfreemap.org/styles/liberty",
-      "unifiedPushDefaultDistributor": "io.heckel.ntfy"
+      "unifiedPushDefaultDistributor": "io.heckel.ntfy",
+      "debugHttp": true
     }
   }
 }
diff --git a/app/src/api/client.ts b/app/src/api/client.ts
index 9ff8659..2f4891d 100644
--- a/app/src/api/client.ts
+++ b/app/src/api/client.ts
@@ -17,4 +17,7 @@ export const ps = new ParkSmarterClient({
   tokens: secureTokenStore,
   localeCode: (Localization.getLocales()[0]?.languageCode ?? 'en').toLowerCase(),
   onUnauthorized: () => authBus.onUnauthorized?.(),
+  // Redacted request/response logging -> logcat (grep "PS →" / "PS ←").
+  // Toggle at runtime with ps.setLogRequests(false), or flip extra.debugHttp.
+  logRequests: Boolean(Constants.expoConfig?.extra?.debugHttp),
 });
diff --git a/app/src/navigation/RootNavigator.tsx b/app/src/navigation/RootNavigator.tsx
index cc6004f..e44dcfd 100644
--- a/app/src/navigation/RootNavigator.tsx
+++ b/app/src/navigation/RootNavigator.tsx
@@ -15,12 +15,20 @@ import { FavoritesScreen } from '@/screens/FavoritesScreen';
 import { SessionsScreen } from '@/screens/SessionsScreen';
 import { MeterDetailScreen } from '@/screens/MeterDetailScreen';
 import { AboutScreen } from '@/screens/AboutScreen';
+import { AccountScreen } from '@/screens/AccountScreen';
+import { ProfileScreen } from '@/screens/ProfileScreen';
+import { VehiclesScreen } from '@/screens/VehiclesScreen';
+import { PaymentMethodsScreen } from '@/screens/PaymentMethodsScreen';
+import { useTheme } from '@/theme/ThemeContext';
 import type { Zone } from 'parksmarter-client';
 
 export type RootStackParamList = {
   Tabs: undefined;
   MeterDetail: { zone: Zone };
   About: undefined;
+  Profile: undefined;
+  Vehicles: undefined;
+  PaymentMethods: undefined;
 };
 
 export type TabParamList = {
@@ -28,6 +36,7 @@ export type TabParamList = {
   Scan: undefined;
   Favorites: undefined;
   Sessions: undefined;
+  Account: undefined;
 };
 
 const Stack = createNativeStackNavigator<RootStackParamList>();
@@ -47,6 +56,7 @@ const TAB_ICONS: Record<keyof TabParamList, keyof typeof Ionicons.glyphMap> = {
   Scan: 'qr-code',
   Favorites: 'star',
   Sessions: 'time',
+  Account: 'person',
 };
 
 function Tabs() {
@@ -65,23 +75,32 @@ function Tabs() {
       <Tab.Screen name="Scan" component={ScanScreen} />
       <Tab.Screen name="Favorites" component={FavoritesScreen} />
       <Tab.Screen name="Sessions" component={SessionsScreen} />
+      <Tab.Screen name="Account" component={AccountScreen} />
     </Tab.Navigator>
   );
 }
 
 export function RootNavigator() {
   const { status } = useAuth();
+  const { navTheme } = useTheme();
 
   if (status === 'loading') {
     return (
-      <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
-        <ActivityIndicator size="large" />
+      <View
+        style={{
+          flex: 1,
+          alignItems: 'center',
+          justifyContent: 'center',
+          backgroundColor: navTheme.colors.background,
+        }}
+      >
+        <ActivityIndicator size="large" color={navTheme.colors.primary} />
       </View>
     );
   }
 
   return (
-    <NavigationContainer>
+    <NavigationContainer theme={navTheme}>
       {status === 'signedIn' ? (
         <Stack.Navigator>
           <Stack.Screen name="Tabs" component={Tabs} options={{ headerShown: false }} />
@@ -91,6 +110,13 @@ export function RootNavigator() {
             options={{ title: 'Meter' }}
           />
           <Stack.Screen name="About" component={AboutScreen} options={{ title: 'About' }} />
+          <Stack.Screen name="Profile" component={ProfileScreen} options={{ title: 'Profile' }} />
+          <Stack.Screen name="Vehicles" component={VehiclesScreen} options={{ title: 'Vehicles' }} />
+          <Stack.Screen
+            name="PaymentMethods"
+            component={PaymentMethodsScreen}
+            options={{ title: 'Payment methods' }}
+          />
         </Stack.Navigator>
       ) : (
         <LoginScreen />
diff --git a/app/src/screens/AccountScreen.tsx b/app/src/screens/AccountScreen.tsx
new file mode 100644
index 0000000..16aa1c6
--- /dev/null
+++ b/app/src/screens/AccountScreen.tsx
@@ -0,0 +1,102 @@
+import React, { useState } from 'react';
+import { ScrollView, StyleSheet, Switch, Text, TouchableOpacity, View } from 'react-native';
+import Constants from 'expo-constants';
+import { Ionicons } from '@expo/vector-icons';
+import { useNavigation } from '@react-navigation/native';
+import type { NativeStackNavigationProp } from '@react-navigation/native-stack';
+import { ps } from '@/api/client';
+import { useAuth } from '@/auth/AuthContext';
+import { useTheme } from '@/theme/ThemeContext';
+import type { RootStackParamList } from '@/navigation/RootNavigator';
+
+type Nav = NativeStackNavigationProp<RootStackParamList>;
+
+export function AccountScreen() {
+  const { colors, mode, toggle } = useTheme();
+  const { logout } = useAuth();
+  const navigation = useNavigation<Nav>();
+  const [logging, setLogging] = useState<boolean>(
+    Boolean(Constants.expoConfig?.extra?.debugHttp),
+  );
+
+  const Item = ({
+    icon,
+    label,
+    onPress,
+  }: {
+    icon: keyof typeof Ionicons.glyphMap;
+    label: string;
+    onPress: () => void;
+  }) => (
+    <TouchableOpacity
+      style={[styles.item, { borderBottomColor: colors.border }]}
+      onPress={onPress}
+    >
+      <Ionicons name={icon} size={20} color={colors.primary} />
+      <Text style={[styles.itemText, { color: colors.text }]}>{label}</Text>
+      <Ionicons name="chevron-forward" size={18} color={colors.subtext} />
+    </TouchableOpacity>
+  );
+
+  return (
+    <ScrollView style={{ backgroundColor: colors.bg }} contentContainerStyle={{ padding: 16 }}>
+      <View style={[styles.card, { backgroundColor: colors.card }]}>
+        <Item icon="person" label="Profile" onPress={() => navigation.navigate('Profile')} />
+        <Item icon="car-sport" label="Vehicles" onPress={() => navigation.navigate('Vehicles')} />
+        <Item
+          icon="card"
+          label="Payment methods"
+          onPress={() => navigation.navigate('PaymentMethods')}
+        />
+        <Item icon="information-circle" label="About" onPress={() => navigation.navigate('About')} />
+      </View>
+
+      <Text style={[styles.section, { color: colors.subtext }]}>Settings</Text>
+      <View style={[styles.card, { backgroundColor: colors.card }]}>
+        <View style={[styles.item, { borderBottomColor: colors.border }]}>
+          <Ionicons name="moon" size={20} color={colors.primary} />
+          <Text style={[styles.itemText, { color: colors.text }]}>Dark mode</Text>
+          <Switch value={mode === 'dark'} onValueChange={toggle} />
+        </View>
+        <View style={[styles.item, { borderBottomColor: colors.border }]}>
+          <Ionicons name="bug" size={20} color={colors.primary} />
+          <Text style={[styles.itemText, { color: colors.text }]}>Log requests (debug)</Text>
+          <Switch
+            value={logging}
+            onValueChange={(v) => {
+              setLogging(v);
+              ps.setLogRequests(v);
+            }}
+          />
+        </View>
+      </View>
+
+      <TouchableOpacity
+        style={[styles.logout, { borderColor: colors.danger }]}
+        onPress={logout}
+      >
+        <Text style={{ color: colors.danger, fontWeight: '700' }}>Sign out</Text>
+      </TouchableOpacity>
+    </ScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  card: { borderRadius: 12, paddingHorizontal: 16 },
+  section: { marginTop: 24, marginBottom: 8, marginLeft: 4, fontSize: 13, fontWeight: '600' },
+  item: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 12,
+    paddingVertical: 16,
+    borderBottomWidth: StyleSheet.hairlineWidth,
+  },
+  itemText: { flex: 1, fontSize: 16 },
+  logout: {
+    marginTop: 28,
+    borderWidth: 1.5,
+    borderRadius: 12,
+    padding: 14,
+    alignItems: 'center',
+  },
+});
diff --git a/app/src/screens/PaymentMethodsScreen.tsx b/app/src/screens/PaymentMethodsScreen.tsx
new file mode 100644
index 0000000..ddcc667
--- /dev/null
+++ b/app/src/screens/PaymentMethodsScreen.tsx
@@ -0,0 +1,77 @@
+import React, { useCallback, useState } from 'react';
+import { ActivityIndicator, FlatList, StyleSheet, Text, View } from 'react-native';
+import { useFocusEffect } from '@react-navigation/native';
+import { ps } from '@/api/client';
+import { useTheme } from '@/theme/ThemeContext';
+import type { CreditCardDetail } from 'parksmarter-client';
+
+export function PaymentMethodsScreen() {
+  const { colors } = useTheme();
+  const [cards, setCards] = useState<CreditCardDetail[]>([]);
+  const [loading, setLoading] = useState(true);
+
+  useFocusEffect(
+    useCallback(() => {
+      setLoading(true);
+      ps.getUserDetail()
+        .then((u) => setCards(u.CreditCardDetails ?? []))
+        .catch(() => setCards([]))
+        .finally(() => setLoading(false));
+    }, []),
+  );
+
+  if (loading) {
+    return (
+      <View style={[styles.center, { backgroundColor: colors.bg }]}>
+        <ActivityIndicator color={colors.primary} />
+      </View>
+    );
+  }
+
+  return (
+    <FlatList
+      style={{ backgroundColor: colors.bg }}
+      contentContainerStyle={{ padding: 16 }}
+      data={cards}
+      keyExtractor={(c, i) => String(c.CCID ?? i)}
+      ListHeaderComponent={
+        <Text style={[styles.note, { color: colors.subtext }]}>
+          View only — add/edit coming later.
+        </Text>
+      }
+      ListEmptyComponent={
+        <Text style={[styles.note, { color: colors.subtext }]}>No saved cards.</Text>
+      }
+      renderItem={({ item }) => (
+        <View style={[styles.card, { backgroundColor: colors.card }]}>
+          <View style={styles.rowBetween}>
+            <Text style={[styles.brand, { color: colors.text }]}>
+              {item.CCAlias || 'Card'}
+            </Text>
+            {String(item.CCDefault) === 'true' ? (
+              <Text style={[styles.badge, { color: colors.primary }]}>Default</Text>
+            ) : null}
+          </View>
+          <Text style={[styles.num, { color: colors.text }]}>
+            •••• •••• •••• {item.CCLastFour ?? '••••'}
+          </Text>
+          <Text style={[styles.meta, { color: colors.subtext }]}>
+            Exp {item.CCExpDate ?? '--/--'}
+            {item.CCZip ? ` · ZIP ${item.CCZip}` : ''}
+          </Text>
+        </View>
+      )}
+    />
+  );
+}
+
+const styles = StyleSheet.create({
+  center: { flex: 1, alignItems: 'center', justifyContent: 'center' },
+  note: { fontSize: 13, marginBottom: 12 },
+  card: { borderRadius: 12, padding: 16, marginBottom: 12 },
+  rowBetween: { flexDirection: 'row', justifyContent: 'space-between' },
+  brand: { fontSize: 16, fontWeight: '700' },
+  badge: { fontSize: 12, fontWeight: '700' },
+  num: { fontSize: 18, letterSpacing: 2, marginTop: 10, fontVariant: ['tabular-nums'] },
+  meta: { fontSize: 13, marginTop: 6 },
+});
diff --git a/app/src/screens/ProfileScreen.tsx b/app/src/screens/ProfileScreen.tsx
new file mode 100644
index 0000000..0da2c05
--- /dev/null
+++ b/app/src/screens/ProfileScreen.tsx
@@ -0,0 +1,68 @@
+import React, { useCallback, useState } from 'react';
+import { ActivityIndicator, ScrollView, StyleSheet, Text, View } from 'react-native';
+import { useFocusEffect } from '@react-navigation/native';
+import { ps } from '@/api/client';
+import { useTheme } from '@/theme/ThemeContext';
+import type { UserDetail } from 'parksmarter-client';
+
+export function ProfileScreen() {
+  const { colors } = useTheme();
+  const [user, setUser] = useState<UserDetail | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  useFocusEffect(
+    useCallback(() => {
+      setLoading(true);
+      ps.getUserDetail()
+        .then(setUser)
+        .catch(() => setUser(null))
+        .finally(() => setLoading(false));
+    }, []),
+  );
+
+  if (loading) {
+    return (
+      <View style={[styles.center, { backgroundColor: colors.bg }]}>
+        <ActivityIndicator color={colors.primary} />
+      </View>
+    );
+  }
+
+  const Row = ({ label, value }: { label: string; value?: string | number }) => (
+    <View style={[styles.row, { borderBottomColor: colors.border }]}>
+      <Text style={[styles.label, { color: colors.subtext }]}>{label}</Text>
+      <Text style={[styles.value, { color: colors.text }]}>{value ?? '—'}</Text>
+    </View>
+  );
+
+  return (
+    <ScrollView
+      style={{ backgroundColor: colors.bg }}
+      contentContainerStyle={{ padding: 16 }}
+    >
+      <View style={[styles.card, { backgroundColor: colors.card }]}>
+        <Row label="Email" value={user?.PersonalEmailAddress} />
+        <Row label="Phone" value={user?.PersonalPhone} />
+        <Row label="Vehicles" value={user?.VehicleDetails?.length ?? 0} />
+        <Row label="Cards" value={user?.CreditCardDetails?.length ?? 0} />
+        <Row
+          label="Marketing offers"
+          value={user?.OffersOptIn ? 'On' : 'Off'}
+        />
+      </View>
+    </ScrollView>
+  );
+}
+
+const styles = StyleSheet.create({
+  center: { flex: 1, alignItems: 'center', justifyContent: 'center' },
+  card: { borderRadius: 12, paddingHorizontal: 16 },
+  row: {
+    flexDirection: 'row',
+    justifyContent: 'space-between',
+    paddingVertical: 14,
+    borderBottomWidth: StyleSheet.hairlineWidth,
+  },
+  label: { fontSize: 14 },
+  value: { fontSize: 15, fontWeight: '600', maxWidth: '60%', textAlign: 'right' },
+});
diff --git a/app/src/screens/VehiclesScreen.tsx b/app/src/screens/VehiclesScreen.tsx
new file mode 100644
index 0000000..ac7d1b3
--- /dev/null
+++ b/app/src/screens/VehiclesScreen.tsx
@@ -0,0 +1,239 @@
+import React, { useCallback, useState } from 'react';
+import {
+  ActivityIndicator,
+  Alert,
+  FlatList,
+  Modal,
+  StyleSheet,
+  Switch,
+  Text,
+  TextInput,
+  TouchableOpacity,
+  View,
+} from 'react-native';
+import { useFocusEffect } from '@react-navigation/native';
+import { ps } from '@/api/client';
+import { useTheme } from '@/theme/ThemeContext';
+import type { VehicleDetail } from 'parksmarter-client';
+
+interface FormState {
+  id?: number;
+  plate: string;
+  state: string;
+  vehicleAlias: string;
+  isDefaultVehicle: boolean;
+}
+
+const EMPTY: FormState = { plate: '', state: '', vehicleAlias: '', isDefaultVehicle: false };
+
+export function VehiclesScreen() {
+  const { colors } = useTheme();
+  const [vehicles, setVehicles] = useState<VehicleDetail[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [editing, setEditing] = useState<FormState | null>(null);
+  const [saving, setSaving] = useState(false);
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    try {
+      const u = await ps.getUserDetail();
+      setVehicles(u.VehicleDetails ?? []);
+    } catch {
+      setVehicles([]);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useFocusEffect(
+    useCallback(() => {
+      void load();
+    }, [load]),
+  );
+
+  const openAdd = () => setEditing({ ...EMPTY });
+  const openEdit = (v: VehicleDetail) =>
+    setEditing({
+      id: typeof v.VehicleID === 'number' ? v.VehicleID : Number(v.VehicleID),
+      plate: v.VehiclePlate ?? '',
+      state: v.VehicleState ?? '',
+      vehicleAlias: v.VehicleAlias ?? '',
+      isDefaultVehicle: String(v.IsDefault) === 'true',
+    });
+
+  const save = async () => {
+    if (!editing) return;
+    if (!editing.plate.trim() || !editing.state.trim()) {
+      Alert.alert('Missing info', 'Plate and state are required.');
+      return;
+    }
+    setSaving(true);
+    try {
+      if (editing.id != null) {
+        await ps.updateVehicle({
+          id: editing.id,
+          plate: editing.plate.trim(),
+          state: editing.state.trim().toUpperCase(),
+          vehicleAlias: editing.vehicleAlias.trim(),
+          isDefaultVehicle: editing.isDefaultVehicle,
+        });
+      } else {
+        await ps.addVehicle({
+          plate: editing.plate.trim(),
+          state: editing.state.trim().toUpperCase(),
+          vehicleAlias: editing.vehicleAlias.trim(),
+          isDefaultVehicle: editing.isDefaultVehicle,
+        });
+      }
+      setEditing(null);
+      await load();
+    } catch (e: any) {
+      Alert.alert('Save failed', e?.serverMessage ?? e?.message ?? 'error');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  const remove = (v: VehicleDetail) => {
+    Alert.alert('Delete vehicle', `Remove ${v.VehiclePlate}?`, [
+      { text: 'Cancel', style: 'cancel' },
+      {
+        text: 'Delete',
+        style: 'destructive',
+        onPress: async () => {
+          try {
+            await ps.deleteVehicle(v.VehicleID as number);
+            await load();
+          } catch (e: any) {
+            Alert.alert('Delete failed', e?.serverMessage ?? e?.message ?? 'error');
+          }
+        },
+      },
+    ]);
+  };
+
+  if (loading) {
+    return (
+      <View style={[styles.center, { backgroundColor: colors.bg }]}>
+        <ActivityIndicator color={colors.primary} />
+      </View>
+    );
+  }
+
+  return (
+    <View style={{ flex: 1, backgroundColor: colors.bg }}>
+      <FlatList
+        contentContainerStyle={{ padding: 16 }}
+        data={vehicles}
+        keyExtractor={(v, i) => String(v.VehicleID ?? i)}
+        ListEmptyComponent={
+          <Text style={[styles.note, { color: colors.subtext }]}>
+            No vehicles yet. Tap “Add vehicle”.
+          </Text>
+        }
+        renderItem={({ item }) => (
+          <View style={[styles.card, { backgroundColor: colors.card }]}>
+            <View style={{ flex: 1 }}>
+              <View style={styles.rowInline}>
+                <Text style={[styles.plate, { color: colors.text }]}>
+                  {item.VehiclePlate} · {item.VehicleState}
+                </Text>
+                {String(item.IsDefault) === 'true' ? (
+                  <Text style={[styles.badge, { color: colors.primary }]}>Default</Text>
+                ) : null}
+              </View>
+              {item.VehicleAlias ? (
+                <Text style={[styles.alias, { color: colors.subtext }]}>{item.VehicleAlias}</Text>
+              ) : null}
+            </View>
+            <TouchableOpacity onPress={() => openEdit(item)} style={styles.action}>
+              <Text style={{ color: colors.primary, fontWeight: '600' }}>Edit</Text>
+            </TouchableOpacity>
+            <TouchableOpacity onPress={() => remove(item)} style={styles.action}>
+              <Text style={{ color: colors.danger, fontWeight: '600' }}>Delete</Text>
+            </TouchableOpacity>
+          </View>
+        )}
+      />
+
+      <TouchableOpacity
+        style={[styles.fab, { backgroundColor: colors.primary }]}
+        onPress={openAdd}
+      >
+        <Text style={styles.fabText}>+ Add vehicle</Text>
+      </TouchableOpacity>
+
+      <Modal visible={editing != null} animationType="slide" transparent>
+        <View style={styles.modalBackdrop}>
+          <View style={[styles.modalCard, { backgroundColor: colors.bg }]}>
+            <Text style={[styles.modalTitle, { color: colors.text }]}>
+              {editing?.id != null ? 'Edit vehicle' : 'Add vehicle'}
+            </Text>
+            {(
+              [
+                ['License plate', 'plate'],
+                ['State (e.g. WA)', 'state'],
+                ['Nickname (optional)', 'vehicleAlias'],
+              ] as const
+            ).map(([ph, key]) => (
+              <TextInput
+                key={key}
+                placeholder={ph}
+                placeholderTextColor={colors.subtext}
+                value={editing?.[key] as string}
+                autoCapitalize="characters"
+                onChangeText={(t) => setEditing((s) => (s ? { ...s, [key]: t } : s))}
+                style={[styles.input, { color: colors.text, borderColor: colors.border }]}
+              />
+            ))}
+            <View style={styles.rowInline}>
+              <Text style={{ color: colors.text }}>Default vehicle</Text>
+              <Switch
+                value={!!editing?.isDefaultVehicle}
+                onValueChange={(v) => setEditing((s) => (s ? { ...s, isDefaultVehicle: v } : s))}
+              />
+            </View>
+            <View style={styles.modalActions}>
+              <TouchableOpacity onPress={() => setEditing(null)} style={styles.action}>
+                <Text style={{ color: colors.subtext, fontWeight: '600' }}>Cancel</Text>
+              </TouchableOpacity>
+              <TouchableOpacity
+                onPress={save}
+                disabled={saving}
+                style={[styles.saveBtn, { backgroundColor: colors.primary }]}
+              >
+                <Text style={styles.fabText}>{saving ? 'Saving…' : 'Save'}</Text>
+              </TouchableOpacity>
+            </View>
+          </View>
+        </View>
+      </Modal>
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  center: { flex: 1, alignItems: 'center', justifyContent: 'center' },
+  note: { fontSize: 14, textAlign: 'center', marginTop: 40 },
+  card: { flexDirection: 'row', alignItems: 'center', borderRadius: 12, padding: 14, marginBottom: 10 },
+  rowInline: { flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', gap: 8 },
+  plate: { fontSize: 16, fontWeight: '700' },
+  alias: { fontSize: 13, marginTop: 2 },
+  badge: { fontSize: 12, fontWeight: '700' },
+  action: { paddingHorizontal: 8, paddingVertical: 6 },
+  fab: {
+    position: 'absolute',
+    bottom: 24,
+    alignSelf: 'center',
+    paddingHorizontal: 24,
+    paddingVertical: 14,
+    borderRadius: 26,
+  },
+  fabText: { color: '#fff', fontWeight: '700' },
+  modalBackdrop: { flex: 1, backgroundColor: 'rgba(0,0,0,0.5)', justifyContent: 'flex-end' },
+  modalCard: { borderTopLeftRadius: 20, borderTopRightRadius: 20, padding: 20, gap: 12 },
+  modalTitle: { fontSize: 20, fontWeight: '700', marginBottom: 4 },
+  input: { borderWidth: 1, borderRadius: 10, padding: 12, fontSize: 16 },
+  modalActions: { flexDirection: 'row', justifyContent: 'flex-end', alignItems: 'center', gap: 16, marginTop: 8 },
+  saveBtn: { paddingHorizontal: 24, paddingVertical: 12, borderRadius: 10 },
+});
diff --git a/app/src/theme/ThemeContext.tsx b/app/src/theme/ThemeContext.tsx
new file mode 100644
index 0000000..b903086
--- /dev/null
+++ b/app/src/theme/ThemeContext.tsx
@@ -0,0 +1,102 @@
+import React, {
+  createContext,
+  useContext,
+  useEffect,
+  useMemo,
+  useState,
+} from 'react';
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import {
+  DarkTheme as NavDark,
+  DefaultTheme as NavLight,
+  type Theme as NavTheme,
+} from '@react-navigation/native';
+
+export type ThemeMode = 'light' | 'dark';
+
+export interface Colors {
+  bg: string;
+  card: string;
+  text: string;
+  subtext: string;
+  border: string;
+  primary: string;
+  danger: string;
+}
+
+const light: Colors = {
+  bg: '#ffffff',
+  card: '#f4f4f4',
+  text: '#111111',
+  subtext: '#666666',
+  border: '#e0e0e0',
+  primary: '#1e6f5c',
+  danger: '#c0392b',
+};
+
+const dark: Colors = {
+  bg: '#0e1513',
+  card: '#1b2422',
+  text: '#f2f2f2',
+  subtext: '#9aa5a1',
+  border: '#2c3a36',
+  primary: '#3fbf9c',
+  danger: '#ef6a5c',
+};
+
+interface ThemeState {
+  mode: ThemeMode;
+  colors: Colors;
+  navTheme: NavTheme;
+  setMode: (m: ThemeMode) => void;
+  toggle: () => void;
+}
+
+const ThemeContext = createContext<ThemeState | null>(null);
+const STORAGE_KEY = 'ps_theme_mode';
+
+export function ThemeProvider({ children }: { children: React.ReactNode }) {
+  const [mode, setModeState] = useState<ThemeMode>('light');
+
+  useEffect(() => {
+    AsyncStorage.getItem(STORAGE_KEY).then((v) => {
+      if (v === 'light' || v === 'dark') setModeState(v);
+    });
+  }, []);
+
+  const setMode = (m: ThemeMode) => {
+    setModeState(m);
+    void AsyncStorage.setItem(STORAGE_KEY, m);
+  };
+
+  const value = useMemo<ThemeState>(() => {
+    const colors = mode === 'dark' ? dark : light;
+    const base = mode === 'dark' ? NavDark : NavLight;
+    const navTheme: NavTheme = {
+      ...base,
+      colors: {
+        ...base.colors,
+        background: colors.bg,
+        card: colors.bg,
+        text: colors.text,
+        border: colors.border,
+        primary: colors.primary,
+      },
+    };
+    return {
+      mode,
+      colors,
+      navTheme,
+      setMode,
+      toggle: () => setMode(mode === 'dark' ? 'light' : 'dark'),
+    };
+  }, [mode]);
+
+  return <ThemeContext.Provider value={value}>{children}</ThemeContext.Provider>;
+}
+
+export function useTheme(): ThemeState {
+  const ctx = useContext(ThemeContext);
+  if (!ctx) throw new Error('useTheme must be used within ThemeProvider');
+  return ctx;
+}
diff --git a/parksmarter-client/src/client.ts b/parksmarter-client/src/client.ts
index ffab6f1..afa9bb8 100644
--- a/parksmarter-client/src/client.ts
+++ b/parksmarter-client/src/client.ts
@@ -45,6 +45,10 @@ export interface ParkSmarterClientOptions {
   uuid?: () => string;
   /** Called when any authenticated request returns 401 (token cleared automatically). */
   onUnauthorized?: () => void;
+  /** Log every request/response (redacted) — useful for on-device debugging via logcat. */
+  logRequests?: boolean;
+  /** Where log lines go (default console.log). */
+  logSink?: (line: string) => void;
 }
 
 function resolveEnvironment(
@@ -69,6 +73,8 @@ export class ParkSmarterClient {
       fetchImpl: options.fetchImpl,
       uuid: options.uuid,
       onUnauthorized: options.onUnauthorized,
+      logRequests: options.logRequests,
+      logSink: options.logSink,
     });
   }
 
@@ -77,6 +83,11 @@ export class ParkSmarterClient {
     this.http.setLocaleCode(localeCode);
   }
 
+  /** Toggle redacted request/response logging at runtime. */
+  setLogRequests(on: boolean): void {
+    this.http.setLogRequests(on);
+  }
+
   private unwrap<D>(p: Promise<ParkSmarterResponse<D>>): Promise<D> {
     return p.then((r) => r.data);
   }
diff --git a/parksmarter-client/src/http.ts b/parksmarter-client/src/http.ts
index 7f6377a..138b603 100644
--- a/parksmarter-client/src/http.ts
+++ b/parksmarter-client/src/http.ts
@@ -106,6 +106,49 @@ export interface HttpClientConfig {
    * stored token and route the user back to sign-in. Fired before the error throws.
    */
   onUnauthorized?: () => void;
+  /**
+   * When true, logs every request/response (method, URL, headers, body, status)
+   * via `logSink` (default: console.log). Sensitive header/body values are
+   * redacted. Handy for capturing traffic in logcat while debugging; turn off in
+   * production.
+   */
+  logRequests?: boolean;
+  /** Where log lines go when logRequests is on. Defaults to console.log. */
+  logSink?: (line: string) => void;
+}
+
+/** Header/body keys whose VALUES must never be logged in the clear. */
+const SENSITIVE_KEYS = new Set(
+  [
+    'Auth_Token',
+    'Application_Token',
+    'ParkSmarter_SessionId',
+    'Password',
+    'OldPassword',
+    'NewPassword',
+    'CCNumber',
+    'CCExpDate',
+    'CCZip',
+    'CCFirstSix',
+    'CCLastFour',
+    'ProviderAuth',
+    'ProviderIdentity',
+  ].map((k) => k.toLowerCase()),
+);
+
+function redact(obj: unknown): unknown {
+  if (!obj || typeof obj !== 'object') return obj;
+  const out: Record<string, unknown> = {};
+  for (const [k, v] of Object.entries(obj as Record<string, unknown>)) {
+    if (SENSITIVE_KEYS.has(k.toLowerCase())) {
+      out[k] = typeof v === 'string' ? `<redacted:${v.length}>` : '<redacted>';
+    } else if (v && typeof v === 'object') {
+      out[k] = redact(v);
+    } else {
+      out[k] = v;
+    }
+  }
+  return out;
 }
 
 function defaultUuid(): string {
@@ -141,6 +184,8 @@ export class HttpClient {
       fetchImpl: config.fetchImpl ?? globalThis.fetch?.bind(globalThis),
       uuid: config.uuid ?? defaultUuid,
       onUnauthorized: config.onUnauthorized ?? (() => {}),
+      logRequests: config.logRequests ?? false,
+      logSink: config.logSink ?? ((line: string) => console.log(line)),
     };
     if (!this.cfg.fetchImpl) {
       throw new Error(
@@ -161,6 +206,11 @@ export class HttpClient {
     this.cfg.localeCode = localeCode;
   }
 
+  /** Toggle request/response logging at runtime (e.g. from a Settings switch). */
+  setLogRequests(on: boolean) {
+    this.cfg.logRequests = on;
+  }
+
   async request<T>(opts: RequestOptions): Promise<ParkSmarterResponse<T>> {
     const { method } = opts;
     const requestId = this.cfg.uuid();
@@ -202,6 +252,15 @@ export class HttpClient {
       else opts.signal.addEventListener('abort', () => controller.abort(), { once: true });
     }
 
+    if (this.cfg.logRequests) {
+      this.cfg.logSink(
+        `[PS →] ${method} ${url}\n  headers: ${JSON.stringify(redact(headers))}` +
+          (opts.body !== undefined && opts.body !== null
+            ? `\n  body: ${JSON.stringify(redact(opts.body))}`
+            : ''),
+      );
+    }
+
     let res: Response;
     try {
       res = await this.cfg.fetchImpl(url, {
@@ -249,6 +308,14 @@ export class HttpClient {
       }
     }
 
+    if (this.cfg.logRequests) {
+      const preview =
+        data && typeof data === 'object'
+          ? JSON.stringify(redact(data)).slice(0, 500)
+          : String(text).slice(0, 300);
+      this.cfg.logSink(`[PS ←] ${res.status} ${method} ${opts.path}  ${preview}`);
+    }
+
     if (!res.ok) {
       if (res.status === 401) {
         // Token invalid/rotated/expired — let the app clear it and re-auth.