A free app for Android, by jApp.

You may have noticed that your smartphone’s or tablet’s display sometimes becomes black or white and that your device’s screen is turned off. This is because the black screen overlay technique, which we present in this app, is a simple yet effective way to save battery on AMOLED and OLED devices.

The app allows you to play videos and save battery on your phone or tablet. You can also use the floating button to quickly turn off the screen and unlock it by tapping on it.

We are very excited to present this simple yet effective app, which will definitely help you save battery on your device.