diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index b74894b..add2286 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -1,6 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
diff --git a/android/app/src/main/java/com/rnpay/AppUtilsModule.java b/android/app/src/main/java/com/rnpay/AppUtilsModule.java
new file mode 100644
index 0000000..558f08c
--- /dev/null
+++ b/android/app/src/main/java/com/rnpay/AppUtilsModule.java
@@ -0,0 +1,39 @@
+package com.rnpay;
+
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.Uri;
+
+import androidx.annotation.NonNull;
+
+import com.facebook.react.bridge.Promise;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContextBaseJavaModule;
+import com.facebook.react.bridge.ReactMethod;
+
+import java.util.List;
+
+public class AppUtilsModule extends ReactContextBaseJavaModule {
+
+    public AppUtilsModule(ReactApplicationContext reactContext) {
+        super(reactContext);
+    }
+
+    @NonNull
+    @Override
+    public String getName() {
+        return "AppUtilsModule";
+    }
+
+    @ReactMethod
+    public void isModifiedAppInstalled(String scheme, Promise promise) {
+        try {
+            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(scheme + "://check"));
+            PackageManager pm = getReactApplicationContext().getPackageManager();
+            List<android.content.pm.ResolveInfo> list = pm.queryIntentActivities(intent, 0);
+            promise.resolve(list != null && !list.isEmpty());
+        } catch (Exception e) {
+            promise.reject("CHECK_ERROR", e.getMessage(), e);
+        }
+    }
+}
diff --git a/android/app/src/main/java/com/rnpay/AppUtilsPackage.java b/android/app/src/main/java/com/rnpay/AppUtilsPackage.java
new file mode 100644
index 0000000..e55abc0
--- /dev/null
+++ b/android/app/src/main/java/com/rnpay/AppUtilsPackage.java
@@ -0,0 +1,23 @@
+package com.rnpay;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.uimanager.ViewManager;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class AppUtilsPackage implements ReactPackage {
+
+    @Override
+    public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
+        return Arrays.<NativeModule>asList(new AppUtilsModule(reactContext));
+    }
+
+    @Override
+    public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
+        return Collections.emptyList();
+    }
+}
diff --git a/android/app/src/main/java/com/rnpay/MainApplication.java b/android/app/src/main/java/com/rnpay/MainApplication.java
index 42b602f..cfd08d2 100644
--- a/android/app/src/main/java/com/rnpay/MainApplication.java
+++ b/android/app/src/main/java/com/rnpay/MainApplication.java
@@ -23,8 +23,7 @@ public class MainApplication extends Application implements ReactApplication {
         protected List<ReactPackage> getPackages() {
           @SuppressWarnings("UnnecessaryLocalVariable")
           List<ReactPackage> packages = new PackageList(this).getPackages();
-          // Packages that cannot be autolinked yet can be added manually here, for example:
-          // packages.add(new MyReactNativePackage());
+          packages.add(new AppUtilsPackage());
           return packages;
         }
 
diff --git a/res/paytm.png b/res/paytm.png
index 1803ce3..6e47285 100644
Binary files a/res/paytm.png and b/res/paytm.png differ
diff --git a/screens/HomeScreen.tsx b/screens/HomeScreen.tsx
index 7a3d2ca..8c93083 100644
--- a/screens/HomeScreen.tsx
+++ b/screens/HomeScreen.tsx
@@ -589,14 +589,18 @@ export default class HomeScreen extends Component<any, HomeScreenState> {
                         </Text>
                     </View>
                     <View style={{ flexDirection: 'row', alignItems: 'center', gap: 10 }}>
-                        <TouchableOpacity onPress={() => {
-                            const domain = getServerDomain();
-                            const colonIdx = domain.lastIndexOf(':');
-                            const host = colonIdx > 0 ? domain.substring(0, colonIdx) : domain;
-                            const port = colonIdx > 0 ? domain.substring(colonIdx + 1) : '';
-                            this.setState({ showServerSettings: true, settingsHost: host, settingsPort: port });
-                        }}>
-                            <Text style={{ fontSize: 13, color: '#3498db' }}>⚙</Text>
+                        <TouchableOpacity
+                            onPress={() => {
+                                const domain = getServerDomain();
+                                const colonIdx = domain.lastIndexOf(':');
+                                const host = colonIdx > 0 ? domain.substring(0, colonIdx) : domain;
+                                const port = colonIdx > 0 ? domain.substring(colonIdx + 1) : '';
+                                this.setState({ showServerSettings: true, settingsHost: host, settingsPort: port });
+                            }}
+                            hitSlop={{ top: 12, bottom: 12, left: 12, right: 12 }}
+                            style={{ padding: 6 }}
+                        >
+                            <Text style={{ fontSize: 20, color: '#3498db' }}>⚙</Text>
                         </TouchableOpacity>
                         <TouchableOpacity onPress={() => this.setState({ showAddWallet: true })} style={s.addBtn}>
                             <Text style={s.addBtnText}>+ Add</Text>
diff --git a/screens/TestScreen.tsx b/screens/TestScreen.tsx
index af96af3..e96822c 100644
--- a/screens/TestScreen.tsx
+++ b/screens/TestScreen.tsx
@@ -1,6 +1,7 @@
 import React, { useEffect, useRef } from 'react';
 import { Alert, StyleSheet, Text, TouchableOpacity, View } from 'react-native';
 import { onProxyMessage, proxySendMessage, paytmPay } from 'rnwalletman';
+import { isModifiedAppInstalled } from '../services/appUtils';
 
 export default function TestScreen() {
     const subRef = useRef<ReturnType<typeof onProxyMessage> | null>(null);
@@ -26,6 +27,18 @@ export default function TestScreen() {
         proxySendMessage({ type: 'echo', messageId: `echo_${Date.now()}`, data: { text: `hello_${Date.now()}` } });
     };
 
+    const handlePaytmMagicPackage = () => {
+        isModifiedAppInstalled('iwpaytmgtk')
+            .then(installed => Alert.alert('Paytm 魔改包', installed ? '已安装' : '未安装'))
+            .catch(err => Alert.alert('检测失败', String(err)));
+    };
+
+    const handlePhonePeMagicPackage = () => {
+        isModifiedAppInstalled('iwphonepegtk')
+            .then(installed => Alert.alert('PhonePe 魔改包', installed ? '已安装' : '未安装'))
+            .catch(err => Alert.alert('检测失败', String(err)));
+    };
+
     return (
         <View style={styles.container}>
             <Text style={styles.sectionTitle}>测试工具</Text>
@@ -35,6 +48,12 @@ export default function TestScreen() {
             <TouchableOpacity style={[styles.btn, { backgroundColor: '#3498db' }]} onPress={handleEcho}>
                 <Text style={styles.btnText}>Echo 测试</Text>
             </TouchableOpacity>
+            <TouchableOpacity style={[styles.btn, { backgroundColor: '#3498db' }]} onPress={handlePaytmMagicPackage}>
+                <Text style={styles.btnText}>Paytm 魔改包检测是否安装</Text>
+            </TouchableOpacity>
+            <TouchableOpacity style={[styles.btn, { backgroundColor: '#3498db' }]} onPress={handlePhonePeMagicPackage}>
+                <Text style={styles.btnText}>PhonePe 魔改包检测是否安装</Text>
+            </TouchableOpacity>
         </View>
     );
 }
diff --git a/servers/walletman b/servers/walletman
index 5762feb..82bbbe9 160000
--- a/servers/walletman
+++ b/servers/walletman
@@ -1 +1 @@
-Subproject commit 5762febe5124fca9b7207545caff7d5f3dfedfde
+Subproject commit 82bbbe9a31eff09cc49d2c3228e1bb4e88da3c5c
diff --git a/services/appUtils.ts b/services/appUtils.ts
new file mode 100644
index 0000000..49e8379
--- /dev/null
+++ b/services/appUtils.ts
@@ -0,0 +1,8 @@
+import { NativeModules, Platform } from 'react-native';
+
+export async function isModifiedAppInstalled(scheme: string): Promise<boolean> {
+    if (Platform.OS !== 'android') return false;
+    const { AppUtilsModule } = NativeModules;
+    if (!AppUtilsModule) return false;
+    return await AppUtilsModule.isModifiedAppInstalled(scheme);
+}