Retina Keypad Lockscreen is a free personalization app developed by Smart Mobile Lin for Android devices. This app is designed to provide a parallax effect keypad locker with an IOS keyboard, allowing users to slide to unlock their screen lock and set password/passcode/pin to enhance their phone security. With this app, users can customize their lock screen with beautiful HD wallpapers and set a custom background from their gallery. The app also displays real-time clock and date, and allows users to disable home/menu/back key in Keypad Lockscreen, ensuring that no one can access their phone without the right password or passcode.

Apart from security, Retina Keypad Lockscreen also offers various customization options such as custom 'Slide to unlock' text, custom text color, and choosing unlock animation. Users can also quickly launch the camera from the lock screen. The app has been tested extensively on popular Android devices including Galaxy S series, HTC One, LG, Xperia, and Nexus. However, if your device is not supported, you can contact the developer for assistance. Overall, Retina Keypad Lockscreen is an excellent choice for Android users looking for a secure and customizable lock screen experience.