diff --git a/app/src/main/java/com/bintianqi/owndroid/AppLock.kt b/app/src/main/java/com/bintianqi/owndroid/AppLock.kt
index 88b59f5..9c4d8ec 100644
--- a/app/src/main/java/com/bintianqi/owndroid/AppLock.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/AppLock.kt
@@ -20,6 +20,7 @@ import androidx.compose.material3.Button
 import androidx.compose.material3.Card
 import androidx.compose.material3.FilledTonalIconButton
 import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -40,6 +41,8 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.text.input.VisualTransformation
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
 import androidx.compose.ui.window.DialogProperties
@@ -51,6 +54,7 @@ fun AppLockDialog(onSucceed: () -> Unit, onDismiss: () -> Unit) = Dialog(onDismi
     val fr = remember { FocusRequester() }
     var input by rememberSaveable { mutableStateOf("") }
     var isError by rememberSaveable { mutableStateOf(false) }
+    var showPassword by remember { mutableStateOf(false) }
     fun unlock() {
         if(input.hash() == SP.lockPasswordHash) {
             fm.clearFocus()
@@ -76,7 +80,18 @@ fun AppLockDialog(onSucceed: () -> Unit, onDismiss: () -> Unit) = Dialog(onDismi
                     keyboardOptions = KeyboardOptions(
                         keyboardType = KeyboardType.Password, imeAction = if(input.length >= 4) ImeAction.Go else ImeAction.Done
                     ),
-                    keyboardActions = KeyboardActions({ fm.clearFocus() }, { unlock() })
+                    keyboardActions = KeyboardActions({ fm.clearFocus() }, { unlock() }),
+                    visualTransformation = if (showPassword) VisualTransformation.None else PasswordVisualTransformation(),
+                    trailingIcon = {
+                        IconButton(onClick = { showPassword = !showPassword }) {
+                            Icon(
+                                painter = painterResource(
+                                    id = if (showPassword) R.drawable.visibility_off_fill0 else R.drawable.visibility_fill0
+                                ),
+                                contentDescription = if (showPassword) "Hide password" else "Show password"
+                            )
+                        }
+                    }
                 )
                 if(Build.VERSION.SDK_INT >= 28 && SP.biometricsUnlock) {
                     FilledTonalIconButton({ startBiometricsUnlock(context, onSucceed) }, Modifier.padding(start = 4.dp)) {
diff --git a/app/src/main/res/drawable/visibility_fill0.xml b/app/src/main/res/drawable/visibility_fill0.xml
new file mode 100644
index 0000000..62b8445
--- /dev/null
+++ b/app/src/main/res/drawable/visibility_fill0.xml
@@ -0,0 +1,11 @@
+<vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:tint="#000000"
+    android:viewportHeight="960"
+    android:viewportWidth="960"
+    android:width="24dp">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M480,640Q555,640 607.5,587.5Q660,535 660,460Q660,385 607.5,332.5Q555,280 480,280Q405,280 352.5,332.5Q300,385 300,460Q300,535 352.5,587.5Q405,640 480,640ZM480,568Q435,568 403.5,536.5Q372,505 372,460Q372,415 403.5,383.5Q435,352 480,352Q525,352 556.5,383.5Q588,415 588,460Q588,505 556.5,536.5Q525,568 480,568ZM480,760Q334,760 214,678.5Q94,597 40,460Q94,323 214,241.5Q334,160 480,160Q626,160 746,241.5Q866,323 920,460Q866,597 746,678.5Q626,760 480,760ZM480,460Q480,460 480,460Q480,460 480,460Q480,460 480,460Q480,460 480,460Q480,460 480,460Q480,460 480,460Q480,460 480,460Q480,460 480,460ZM480,680Q593,680 687.5,620.5Q782,561 832,460Q782,359 687.5,299.5Q593,240 480,240Q367,240 272.5,299.5Q178,359 128,460Q178,561 272.5,620.5Q367,680 480,680Z"/>
+</vector>