Smart AppLock – App Lock

Smart AppLock is a privacy-focused app locker that lets you restrict access to selected apps using PIN, pattern or fingerprint authentication.
It works without unnecessary permissions and gives you control over how and when your apps are protected.

🔒 App Lock with PIN, Pattern or Fingerprint

Choose your preferred lock method and apply it to individual apps.
The lock screen appears whenever a protected app is opened.

🛡️ Additional Protection Options

• Optional cover screen that displays before the lock screen
• Optional attempt-capture feature that stores a photo when a wrong password is entered
• Adjustable delay settings for repeated unlocks
• Support for trusted devices and flexible unlock behavior

🎨 Simple & Clear Interface

Smart AppLock offers a clean layout to select and manage protected apps.
You can organize your lock list and adjust settings at any time.

🔐 Privacy-Focused

Smart AppLock does not collect or store personal data.
All processing takes place on your device, and no data is sent to external servers.

📢 Accessibility Service Disclosure

Smart AppLock uses Android’s Accessibility Service only to provide the app lock functionality.

Why it is used

• To identify when a selected app is opened
• To display the lock screen above the detected app

What the service can access

• Foreground app information
• Limited view content needed to detect protected apps

What the service cannot do

• It does not read messages, passwords or personal data
• It does not perform actions inside other apps
• It does not send any data to external servers or third parties

Data Handling

All Accessibility data is processed locally on your device.
Nothing is stored externally or shared.

Your Control

The Accessibility permission is optional and can be disabled anytime from:
Settings → Accessibility → App Lock

📌 Additional Permissions

• Draw over other apps: required to display the lock screen
• Battery optimization settings: may need adjustment on some devices for consistent locking

🚀 Getting Started

Open Smart AppLock

Select apps to protect

Enable Accessibility Service

Set your PIN, pattern or fingerprint

Smart AppLock provides a simple, private way to add an extra layer of protection to apps on your device.

Recent changes:
🔐 Added support for alphanumeric passwords
🛠️ Fixed a crash when using biometric authentication with the Accessibility Service enabled
🎨 Fixed the lock screen overlay background color
🔊 Fixed Accessibility menu behavior in the volume panel
🔒 Fixed an issue where the lock screen would not appear again after the first unlock