diff --git a/App.js b/App.js
index ff138b5..e31b89d 100644
--- a/App.js
+++ b/App.js
@@ -1,17 +1,26 @@
 import "react-native-gesture-handler";
 import { StatusBar } from "expo-status-bar";
-import { StyleSheet } from "react-native";
+import { Appearance, StyleSheet } from "react-native";
 import { createDrawerNavigator } from "@react-navigation/drawer";
 import { NavigationContainer } from "@react-navigation/native";
 import SideBar from "./src/Components/SideBar";
 import FaqScreen from "./src/Screens/FAQ";
 import FeedbackScreen from "./src/Screens/Feedback";
 import { PaperProvider } from "react-native-paper";
-import { Theme } from "./src/utils";
+import {
+  AppContext,
+  AppProvider,
+  Constants,
+  GetData,
+  GetDataFromList,
+  GetMultipleData,
+  Theme,
+} from "./src/utils";
 import DeviceOldScreen from "./src/Screens/DeviceOld";
 import DeviceScreen from "./src/Screens/Device";
 import { Colors } from "react-native-ui-lib";
 import SettingsScreen from "./src/Screens/Settings";
+import { useContext, useEffect } from "react";
 
 Colors.loadSchemes({
   light: {
@@ -43,11 +52,53 @@ const Drawer = createDrawerNavigator();
     SECONDARY: "#9b59b6",
 */
 
-export default function App() {
+export function MyApp() {
+  const appContext = useContext(AppContext);
+
+  useEffect(() => {
+    const loadData = async () => {
+      const data = await GetMultipleData([
+        "appLanguage",
+        "appColorScheme",
+        "userExpertMode",
+        "userDeveloperMode",
+      ]);
+
+      const appLanguage = GetDataFromList(data, "appLanguage");
+      const appColorScheme = GetDataFromList(data, "appColorScheme");
+      const userExpertMode = GetDataFromList(data, "userExpertMode");
+      const userDeveloperMode = GetDataFromList(data, "userDeveloperMode");
+
+      appContext.setAppLanguage(
+        appLanguage === null ? Constants.defaultLanguage : appLanguage
+      );
+      appContext.setAppColorScheme(
+        appColorScheme === null ? Appearance.getColorScheme() : appColorScheme
+      );
+
+      appContext.setIsUserExpertModeEnabled(
+        userExpertMode == null ? false : userExpertMode
+      );
+
+      appContext.setUserIsDeveloperModeEnabled(
+        userDeveloperMode == null ? false : userDeveloperMode
+      );
+    };
+
+    loadData();
+  }, []);
+
   return (
     <PaperProvider theme={Theme}>
       <NavigationContainer>
-        <Drawer.Navigator drawerContent={(props) => <SideBar {...props} />}>
+        <Drawer.Navigator
+          screenOptions={{
+            drawerStyle: {
+              backgroundColor: appContext.appTheme.drawer.backgroundColor,
+            },
+          }}
+          drawerContent={(props) => <SideBar {...props} />}
+        >
           <Drawer.Screen name="Splash X3" component={DeviceScreen} />
           <Drawer.Screen name="Spinner V6" component={DeviceOldScreen} />
           <Drawer.Screen name="FAQ" component={FaqScreen} />
@@ -61,6 +112,14 @@ export default function App() {
   );
 }
 
+export default function App() {
+  return (
+    <AppProvider>
+      <MyApp />
+    </AppProvider>
+  );
+}
+
 const styles = StyleSheet.create({
   container: {
     flex: 1,
diff --git a/src/Components/Card/index.js b/src/Components/Card/index.js
index f4a6348..9935723 100644
--- a/src/Components/Card/index.js
+++ b/src/Components/Card/index.js
@@ -1,6 +1,10 @@
+import { useContext } from "react";
 import { ScrollView, View } from "react-native";
+import { AppContext } from "../../utils";
 
 export default function Card({ children }) {
+  const appContext = useContext(AppContext);
+
   return (
     <View
       style={{
@@ -13,7 +17,7 @@ export default function Card({ children }) {
       <View
         style={{
           borderRadius: 20,
-          backgroundColor: "#3f4042",
+          backgroundColor: appContext.appTheme.card.backgroundColor,
           elevation: 5,
           padding: 20,
         }}
diff --git a/src/Components/Divider/index.js b/src/Components/Divider/index.js
index 6b0f2c8..dae4c1d 100644
--- a/src/Components/Divider/index.js
+++ b/src/Components/Divider/index.js
@@ -1,7 +1,12 @@
 import { View } from "react-native";
 
-export function Divider() {
+export function Divider({ style }) {
   return (
-    <View style={{ height: 1, backgroundColor: "gray", marginVertical: 10 }} />
+    <View
+      style={[
+        style,
+        { height: 1, backgroundColor: "gray", marginVertical: 10 },
+      ]}
+    />
   );
 }
diff --git a/src/Components/SideBar/index.js b/src/Components/SideBar/index.js
index 3007af2..2c3e730 100644
--- a/src/Components/SideBar/index.js
+++ b/src/Components/SideBar/index.js
@@ -1,36 +1,55 @@
 import { DrawerContentScrollView, DrawerItem } from "@react-navigation/drawer";
-import { useEffect, useState } from "react";
-import { Image, StyleSheet, View } from "react-native";
-import { Divider, Text } from "react-native-paper";
-import { GetData } from "../../utils";
+import { useContext } from "react";
+import { Image, Text, View } from "react-native";
+import { AppContext, AppStyles } from "../../utils";
+import { Divider } from "../Divider";
 
 export default function Sidebar(props) {
-  const [isDeveloperModeEnabled, setIsDeveloperModeEnabled] = useState(false);
+  const appContext = useContext(AppContext);
 
-  useEffect(() => {
-    async function getDeveloperMode() {
-      setIsDeveloperModeEnabled(await GetData("developerMode"));
-    }
-
-    getDeveloperMode();
-  }, []);
+  const MyDrawerItem = ({ label, onPress }) => {
+    return (
+      <DrawerItem
+        label={label}
+        onPress={onPress}
+        inactiveTintColor={appContext.appTheme.drawer.item.inactiveTintColor}
+        activeTintColor={appContext.appTheme.drawer.item.activeTintColor}
+      />
+    );
+  };
 
   return (
     <>
-      {isDeveloperModeEnabled ? (
+      {appContext.isUserDeveloperModeEnabled ? (
         <Image
           source={require("../../../assets/image.png")}
-          style={styles.image}
+          style={{
+            width: "100%",
+            height: 250,
+          }}
         />
       ) : (
-        <View style={[styles.image, { backgroundColor: "#ddd" }]} />
+        <View
+          style={[
+            {
+              width: "100%",
+              height: 250,
+            },
+            { backgroundColor: "#ddd" },
+          ]}
+        />
       )}
-      <Text variant="titleLarge" style={{ fontWeight: "bold", marginLeft: 10 }}>
+      <Text
+        style={[
+          AppStyles.typography20,
+          { marginLeft: 10, marginTop: 10, color: appContext.appTheme.text },
+        ]}
+      >
         Geräte
       </Text>
       <DrawerContentScrollView contentContainerStyle={{ paddingTop: 0 }}>
         {["Splash X3", "Spinner V6"].map((item, i) => (
-          <DrawerItem
+          <MyDrawerItem
             key={i}
             label={item}
             onPress={() => props.navigation.navigate(item)}
@@ -40,15 +59,15 @@ export default function Sidebar(props) {
 
       <View style={{ justifyContent: "flex-end" }}>
         <Divider style={{ marginLeft: 10, marginRight: 10 }} />
-        <DrawerItem
+        <MyDrawerItem
           label={"FAQ"}
           onPress={() => props.navigation.navigate("FAQ")}
         />
-        <DrawerItem
+        <MyDrawerItem
           label={"Feedback geben"}
           onPress={() => props.navigation.navigate("Feedback")}
         />
-        <DrawerItem
+        <MyDrawerItem
           label={"Einstellungen"}
           onPress={() => props.navigation.navigate("Settings")}
         />
@@ -56,10 +75,3 @@ export default function Sidebar(props) {
     </>
   );
 }
-
-const styles = StyleSheet.create({
-  image: {
-    width: "100%",
-    height: 250,
-  },
-});
diff --git a/src/Screens/Device/index.js b/src/Screens/Device/index.js
index d91426e..70fc146 100644
--- a/src/Screens/Device/index.js
+++ b/src/Screens/Device/index.js
@@ -1,9 +1,9 @@
-import { useEffect, useState } from "react";
+import { useContext, useEffect, useState } from "react";
 import { Image, ScrollView, StyleSheet, View, Text } from "react-native";
 import { IconButton } from "react-native-paper";
 import { Colors } from "react-native-ui-lib";
 import LightView from "./light";
-import { GetData } from "../../utils";
+import { AppContext, GetData } from "../../utils";
 import MotorView from "./motor";
 import SettingsView from "./settings";
 
@@ -19,18 +19,8 @@ const iconButtonActiveColor = "#e67e22";
 const iconButtonNotActiveColor = "#fff";
 
 export default function DeviceScreen() {
+  const appContext = useContext(AppContext);
   const [selectedView, setSelectedView] = useState(0);
-  const [isDeveloperModeEnabled, setIsDeveloperModeEnabled] = useState(false);
-
-  useEffect(() => {
-    async function getMode() {
-      const data = await GetData("developerMode");
-
-      setIsDeveloperModeEnabled(data);
-    }
-
-    getMode();
-  }, []);
 
   const SelectedView = () => {
     switch (selectedView) {
@@ -49,10 +39,10 @@ export default function DeviceScreen() {
     <View
       style={{
         height: "100%",
-        backgroundColor: "#2e2e30",
+        backgroundColor: appContext.appTheme.backgroundColor,
       }}
     >
-      {isDeveloperModeEnabled ? (
+      {appContext.isUserDeveloperModeEnabled ? (
         <Image
           source={require("../../../assets/image.png")}
           style={styles.image}
diff --git a/src/Screens/Device/light.js b/src/Screens/Device/light.js
index ef8ff81..52fbdae 100644
--- a/src/Screens/Device/light.js
+++ b/src/Screens/Device/light.js
@@ -1,4 +1,4 @@
-import { useEffect, useState } from "react";
+import { useContext, useEffect, useState } from "react";
 import { StyleSheet, Text, View } from "react-native";
 import { IconButton, TouchableRipple } from "react-native-paper";
 import Animated, {
@@ -12,7 +12,7 @@ import ColorPicker, {
   HueCircular,
   Panel1,
 } from "reanimated-color-picker";
-import { GetData } from "../../utils";
+import { AppContext, GetData } from "../../utils";
 import Card from "../../Components/Card";
 
 const dropdown = require("../../../assets/icons/chevronDown.png");
@@ -109,12 +109,12 @@ function ColorSwatch({ color, onPress }) {
 } */
 
 export default function LightView() {
+  const appContext = useContext(AppContext);
   const [pickerValue, setPickerValue] = useState("");
   const [switchState, setSwitchState] = useState(false);
   const [sliderValue, setSliderValue] = useState(0);
   const [selectedGlasLayer, setSelectedGlasLayer] = useState(1);
   const [colorSwatchesFavorites, setColorSwatchesFavorites] = useState([]);
-  const [isExpertModeEnabled, setSwitchExpertModeEnabled] = useState(false);
 
   /*const customSwatches = new Array(12)
     .fill("#fff")
@@ -126,16 +126,6 @@ export default function LightView() {
   const selectedColorLayer3 = useSharedValue(selectedColorPickerColor.value);
   const selectedColorLayer4 = useSharedValue(selectedColorPickerColor.value);
 
-  useEffect(() => {
-    async function getModes() {
-      const data = await GetData("expertMode");
-
-      setSwitchExpertModeEnabled(data);
-    }
-
-    getModes();
-  }, []);
-
   const onColorSelect = (color) => {
     selectedColorPickerColor.value = color.hex;
 
@@ -279,7 +269,7 @@ export default function LightView() {
             colors={colorSwatchesFavorites}
           />
 
-          {isExpertModeEnabled && (
+          {appContext.isUserExpertModeEnabled && (
             <View style={styles.previewTxtContainer}>
               <InputWidget
                 inputStyle={styles.inputWidget}
diff --git a/src/Screens/Settings/index.js b/src/Screens/Settings/index.js
index 7fd2d6b..0fe708f 100644
--- a/src/Screens/Settings/index.js
+++ b/src/Screens/Settings/index.js
@@ -1,36 +1,34 @@
-import { useEffect, useState } from "react";
+import { useContext, useEffect, useState } from "react";
 import { Text, View } from "react-native";
 import { ScrollView } from "react-native-gesture-handler";
 import { Picker, Switch } from "react-native-ui-lib";
 import Card from "../../Components/Card";
 import AsyncStorage from "@react-native-async-storage/async-storage";
-import { AppStyles, GetData, GetMultipleData, StoreData } from "../../utils";
+import {
+  AppContext,
+  AppStyles,
+  GetData,
+  GetMultipleData,
+  StoreData,
+} from "../../utils";
+import { Divider } from "../../Components/Divider";
 
 export default function SettingsScreen() {
-  const [switchDeveloperMode, setSwitchDeveloperMode] = useState(false);
-  const [switchExpertMode, setSwitchExpertMode] = useState(false);
-  const [selectedColorScheme, setSelectedColorScheme] = useState("auto");
-  const [selectedLanguage, setSelectedLanguage] = useState("de");
-
-  useEffect(() => {
-    async function getModes() {
-      const data = await GetMultipleData(["developerMode", "expertMode"]);
-
-      setSwitchDeveloperMode(data[0][1]);
-      setSwitchExpertMode(data[1][1]);
-    }
-
-    getModes();
-  }, []);
+  const appContext = useContext(AppContext);
 
   return (
-    <View style={{ height: "100%", backgroundColor: "#2e2e30" }}>
+    <View
+      style={{
+        height: "100%",
+        backgroundColor: appContext.appTheme.backgroundColor,
+      }}
+    >
       <Card>
         <Text
           style={[
             AppStyles.typography20,
             {
-              color: "#fff",
+              color: appContext.appTheme.text,
               marginBottom: 10,
             },
           ]}
@@ -40,8 +38,8 @@ export default function SettingsScreen() {
 
         <Picker
           label="Sprache"
-          value={selectedLanguage}
-          onChange={(v) => setSelectedLanguage(v)}
+          value={appContext.appLanguage}
+          onChange={(v) => appContext.setAppLanguage(v)}
           fieldType={Picker.fieldTypes.settings}
           showSearch
           searchPlaceholder="Search a language"
@@ -54,14 +52,47 @@ export default function SettingsScreen() {
 
         <Picker
           label="Anzeigemodus"
-          value={selectedColorScheme}
-          onChange={(v) => setSelectedColorScheme(v)}
+          value={appContext.appColorScheme}
+          onChange={(v) => appContext.setAppColorScheme(v)}
           fieldType={Picker.fieldTypes.settings}
         >
           <Picker.Item key={1} label="System default" value={"auto"} />
           <Picker.Item key={2} label="Dark" value={"dark"} />
-          <Picker.Item key={3} label="White" value={"white"} />
+          <Picker.Item key={3} label="Light" value={"light"} />
         </Picker>
+        <Divider />
+        <View
+          style={{
+            flexDirection: "row",
+            alignItems: "center",
+            justifyContent: "space-between",
+          }}
+        >
+          <View style={{ width: "80%" }}>
+            <Text
+              style={[
+                AppStyles.typography16,
+                { color: appContext.appTheme.text },
+              ]}
+            >
+              Experten Modus
+            </Text>
+            <Text
+              style={[
+                AppStyles.typography14,
+                { color: appContext.appTheme.textSecondary },
+              ]}
+            >
+              Durch das Einschalten werden zusätzliche Funktionen in der App
+              freigeschaltet, wie beispielsweise die Möglichkeit,
+              benutzerdefinierte Farbcodes anzugeben.
+            </Text>
+          </View>
+          <Switch
+            value={appContext.isUserExpertModeEnabled}
+            onValueChange={(e) => appContext.setIsUserExpertModeEnabled(e)}
+          />
+        </View>
       </Card>
 
       <Card>
@@ -72,31 +103,12 @@ export default function SettingsScreen() {
             justifyContent: "space-between",
           }}
         >
-          <Text style={{ color: "#fff" }}>Developer Mode</Text>
+          <Text style={{ color: appContext.appTheme.text }}>
+            Developer Mode
+          </Text>
           <Switch
-            value={switchDeveloperMode}
-            onValueChange={(e) => {
-              setSwitchDeveloperMode(e);
-              StoreData("developerMode", e);
-            }}
-          />
-        </View>
-
-        <View
-          style={{
-            marginTop: 10,
-            flexDirection: "row",
-            alignItems: "center",
-            justifyContent: "space-between",
-          }}
-        >
-          <Text style={{ color: "#fff" }}>Expert Mode</Text>
-          <Switch
-            value={switchExpertMode}
-            onValueChange={async (e) => {
-              setSwitchExpertMode(e);
-              StoreData("expertMode", e);
-            }}
+            value={appContext.isUserDeveloperModeEnabled}
+            onValueChange={(e) => appContext.setUserIsDeveloperModeEnabled(e)}
           />
         </View>
       </Card>
diff --git a/src/utils.js b/src/utils.js
index 649ac16..b548481 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -1,14 +1,13 @@
 import AsyncStorage from "@react-native-async-storage/async-storage";
+import { createContext, useState } from "react";
 import { StyleSheet } from "react-native";
 import { DefaultTheme } from "react-native-paper";
 
+export const Constants = {
+  defaultLanguage: "de",
+};
+
 export const AppStyles = StyleSheet.create({
-  container: {
-    flex: 1,
-    backgroundColor: "#fff",
-    alignItems: "center",
-    justifyContent: "center",
-  },
   typography20: {
     fontSize: 20,
     fontWeight: "bold",
@@ -24,6 +23,46 @@ export const AppStyles = StyleSheet.create({
   },
 });
 
+const DarkAppTheme = {
+  colors: {
+    primary: "#e67e22",
+    secondary: "#9b59b6",
+  },
+  text: "#fff",
+  textSecondary: "#ddd",
+  backgroundColor: "#2e2e30",
+  card: {
+    backgroundColor: "#3f4042",
+  },
+  drawer: {
+    backgroundColor: "#2e2e30",
+    item: {
+      inactiveTintColor: "#fff",
+      activeTintColor: "lime",
+    },
+  },
+};
+
+const LightAppTheme = {
+  colors: {
+    primary: "#e67e22",
+    secondary: "#9b59b6",
+  },
+  text: "#000",
+  textSecondary: "#555",
+  backgroundColor: "#fff",
+  card: {
+    backgroundColor: "#fff",
+  },
+  drawer: {
+    backgroundColor: "#fff",
+    item: {
+      inactiveTintColor: "#fff",
+      activeTintColor: "lime",
+    },
+  },
+};
+
 export const Theme = {
   ...DefaultTheme,
   colors: {
@@ -98,3 +137,72 @@ export async function GetMultipleData(keys) {
     console.log("err", e);
   }
 }
+
+export function GetDataFromList(list, key) {
+  return list.find((v) => v[0] === key)[1];
+}
+
+const appContextPreview = {
+  appColorScheme: "",
+  appLanguage: "",
+  isUserExpertModeEnabled: "",
+  isUserDeveloperModeEnabled: "",
+  appTheme: DarkAppTheme,
+};
+
+export const AppContext = createContext(appContextPreview);
+
+export function AppProvider({ children }) {
+  const [appLanguage, setAppLanguage] = useState("de");
+  const [appColorScheme, setAppColorScheme] = useState("");
+  const [appTheme, setAppTheme] = useState(DarkAppTheme);
+  const [isUserExpertModeEnabled, setIsUserExpertModeEnabled] = useState(false);
+  // TODO: only while development
+  const [isUserDeveloperModeEnabled, setIsUserDeveloperModeEnabled] =
+    useState(false);
+
+  const saveAppColorScheme = async (value) => {
+    StoreData("appColorScheme", value);
+    setAppColorScheme(value);
+
+    if (value === "dark") {
+      setAppTheme(DarkAppTheme);
+    } else {
+      setAppTheme(LightAppTheme);
+    }
+  };
+
+  const saveAppLanguage = async (value) => {
+    StoreData("appLanguage", value);
+    setAppLanguage(value);
+  };
+
+  const saveUserExpertMode = async (value) => {
+    StoreData("userExpertMode", value);
+    setIsUserExpertModeEnabled(value);
+  };
+
+  // TODO: only while development
+  const saveUserDeveloperMode = async (value) => {
+    StoreData("userDeveloperMode", value);
+    setIsUserDeveloperModeEnabled(value);
+  };
+
+  return (
+    <AppContext.Provider
+      value={{
+        appLanguage: appLanguage,
+        setAppLanguage: saveAppLanguage,
+        appColorScheme: appColorScheme,
+        setAppColorScheme: saveAppColorScheme,
+        appTheme: appTheme,
+        isUserExpertModeEnabled: isUserExpertModeEnabled,
+        setIsUserExpertModeEnabled: saveUserExpertMode,
+        isUserDeveloperModeEnabled: isUserDeveloperModeEnabled,
+        setUserIsDeveloperModeEnabled: saveUserDeveloperMode,
+      }}
+    >
+      {children}
+    </AppContext.Provider>
+  );
+}