diff --git a/App.tsx b/App.tsx
index 5b12b90..142a2bf 100644
--- a/App.tsx
+++ b/App.tsx
@@ -2,39 +2,41 @@ import React, { useState, useEffect, createContext, useContext } from 'react';
 import { Text, View, StyleSheet, ActivityIndicator, TouchableOpacity, FlatList } from 'react-native';
 import { NavigationContainer } from '@react-navigation/native';
 import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';
-import { CameraView, Camera } from 'expo-camera';
-import { Ionicons } from '@expo/vector-icons';
+import { CameraView, Camera } from 'expo-camera'; // The icons used in the navigation bar
+import { Ionicons } from '@expo/vector-icons'; // Import Axios for HTTP requests for the VT API call
 import axios from 'axios';
-
+// Create a Context for QR code data
 const QRCodeContext = createContext(null);
 
 const Tab = createBottomTabNavigator();
 
-
+// Component for QR Scanner Screen
 const QRScannerScreen: React.FC = () => {
-  const { qrCodes, setQrCodes } = useContext(QRCodeContext);
-  const [hasPermission, setHasPermission] = useState<boolean | null>(null);
-  const [scanned, setScanned] = useState<boolean>(false);
-  const [showSplash, setShowSplash] = useState<boolean>(true);
-  const [scannedData, setScannedData] = useState<string>('');
-  const [scanResult, setScanResult] = useState<any>(null);
+  const { qrCodes, setQrCodes } = useContext(QRCodeContext); // Access context
+  const [hasPermission, setHasPermission] = useState<boolean | null>(null); // State for camera permission
+  const [scanned, setScanned] = useState<boolean>(false); // State for scanned status
+  const [showSplash, setShowSplash] = useState<boolean>(true); // State for splash screen
+  const [scannedData, setScannedData] = useState<string>(''); // State for scanned data
+  const [scanResult, setScanResult] = useState<any>(null); // State for VirusTotal scan result
 
 
   useEffect(() => {
     const initializeApp = async () => {
-      const { status } = await Camera.requestCameraPermissionsAsync();
-      setHasPermission(status === 'granted');
-      setShowSplash(false);
+      const { status } = await Camera.requestCameraPermissionsAsync(); // Request camera permissions
+      setHasPermission(status === 'granted'); // Set permission status
+      setShowSplash(false); // Hide splash screen
     };
 
-    initializeApp();
+    initializeApp(); // Initialize app
   }, []);
 
 
 
-
+  // Function to handle barcode scanned event
   const handleQRCodeSanned = async ({ type, data }: { type: string; data: string }) => {
-    setScanned(true);
+    setScanned(true);// Mark as scanned
+
+    // Determine the type of data (URL, text, or just numbers)
     let dataType;
     if (/^(http|https):\/\//.test(data)) {
       dataType = 'URL';
@@ -44,37 +46,42 @@ const QRScannerScreen: React.FC = () => {
       dataType = 'Text';
     }
 
-    let newScannedData = `Type: ${dataType}\nData: ${data}`;
+    // Construct the scanned data with the data type
+    let newScannedData = `Type: ${dataType}\nData: ${data}`; // Initialize with type and data
 
     try {
-      const scanId = await scanWithVirusTotal(data);
-      const positive = await getScanResult(scanId);
-      newScannedData += `\nScore: ${positive}`;
+      const scanId = await scanWithVirusTotal(data); // Send data to VirusTotal and get scan ID
+      const positive = await getScanResult(scanId); // Get scan result and extract positive score
+      newScannedData += `\nScore: ${positive}`; // Append positive score to newScannedData
     } catch (error) {
-      console.error('Error handling barcode scan:', error);
+      console.error('Error handling barcode scan:', error); // Handle error
     }
 
-    setScannedData(newScannedData);
-    setQrCodes([...qrCodes, newScannedData]);
+    setScannedData(newScannedData); // Save scanned data
+    setQrCodes([...qrCodes, newScannedData]); // Add scanned data to history
   };
 
+  // Function to send data to VirusTotal and get the scan ID
   const scanWithVirusTotal = async (data: any) => {
-    const apiKey = '3566a17933bb36dd97cb35e84d0446e5ab8ad623e6de968d34b655c79485251e';
+    const apiKey = '3566a17933bb36dd97cb35e84d0446e5ab8ad623e6de968d34b655c79485251e'; // 4/min , 500/day
     const url = 'https://www.virustotal.com/vtapi/v2/url/scan';
     const params = {
       apikey: apiKey,
       url: data
     };
 
+    // The axios to handle URL stuff
     try {
       const response = await axios.post(url, null, { params });
-      return response.data.scan_id;
+      return response.data.scan_id; // Return scanID
     } catch (error) {
       console.error('Error scanning with VirusTotal:', error);
       throw error;
     }
   };
 
+  // Get the full list of scanned result based on scanID from
+  // response above, Only want response.data.positive
   const getScanResult = async (scanId: Int32Array) => {
     const apiKey = '3566a17933bb36dd97cb35e84d0446e5ab8ad623e6de968d34b655c79485251e';
     const url = 'https://www.virustotal.com/vtapi/v2/url/report';
@@ -83,9 +90,10 @@ const QRScannerScreen: React.FC = () => {
       resource: scanId
     };
 
+    // The axios to handle URL stuff
     try {
       const response = await axios.get(url, { params });
-      return response.data.positives;
+      return response.data.positives;  // Reture the value of positive:
     } catch (error) {
       console.error('Error getting scan result:', error);
       throw error;
@@ -110,10 +118,16 @@ const QRScannerScreen: React.FC = () => {
 
   return (
     <View style={styles.container}>
+
+       {/* Header banner */}
       <View style={styles.banner}>
         <Text style={styles.headerText}>SafeQR</Text>
       </View>
+
+      {/* Welcome message */}
       <Text style={styles.welcomeText}>Welcome to SafeQR code Scanner</Text>
+
+      {/* Camera view container */}
       <View style={styles.cameraContainer}>
         <CameraView
           onBarcodeScanned={scanned ? undefined : handleQRCodeSanned}
@@ -121,6 +135,8 @@ const QRScannerScreen: React.FC = () => {
           style={styles.camera}
         />
       </View>
+
+      {/* Display scanned data */}
       {scannedData !== '' && (
         <View style={styles.dataBox}>
           <Text style={styles.dataText}>{scannedData}</Text>
@@ -131,6 +147,8 @@ const QRScannerScreen: React.FC = () => {
   );
 };
 
+
+// Component for History Screen
 function HistoryScreen() {
   const { qrCodes } = useContext(QRCodeContext);
 
@@ -138,24 +156,24 @@ function HistoryScreen() {
     <View style={styles.container}>
       <Text style={styles.welcomeText}>History Screen</Text>
       <FlatList
-        data={qrCodes}
+        data={qrCodes} // Data for FlatList
         renderItem={({ item }) => (
           <View style={styles.dataBox}>
             <Text style={styles.dataText}>{item}</Text>
           </View>
         )}
-        keyExtractor={(item, index) => index.toString()}
+        keyExtractor={(item, index) => index.toString()} // Key extractor for FlatList
       />
     </View>
   );
 }
 
-function SettingsScreen() {
-  const { setQrCodes } = useContext(QRCodeContext);
 
-  const clearHistory = () => {
-    setQrCodes([]);
-  };
+// Component for Settings Screen
+function SettingsScreen() {
+  const { setQrCodes } = useContext(QRCodeContext); // Access context
+
+  const clearHistory = () => {setQrCodes([]);}; // To clear History
 
   return (
     <View style={styles.container}>
@@ -167,6 +185,7 @@ function SettingsScreen() {
   );
 }
 
+// Component for Profile Screen
 function ProfileScreen() {
   return (
     <View style={styles.container}>
@@ -207,7 +226,10 @@ const CustomTabBar = ({ state, descriptors, navigation }) => {
           });
         };
 
-        const iconName = route.name === 'QR Scanner' ? 'camera' : route.name === 'History' ? 'time' : route.name === 'Settings' ? 'settings' : 'person';
+        // Set different icons for each tab
+        const iconName = route.name === 'QR Scanner' ? 'camera' 
+        : route.name === 'History' ? 'time' 
+        : route.name === 'Settings' ? 'settings' : 'person';
 
         return (
           <TouchableOpacity
@@ -236,8 +258,16 @@ const CustomTabBar = ({ state, descriptors, navigation }) => {
   );
 };
 
+
+
+
+
+
+
+
+// Main App component with bottom tab navigation
 export default function App() {
-  const [qrCodes, setQrCodes] = useState([]);
+  const [qrCodes, setQrCodes] = useState([]); // State to hold QR codes
 
   return (
     <QRCodeContext.Provider value={{ qrCodes, setQrCodes }}>