KnockOn - Tap to wake

With KnockOn you can easily wake or lock your phone with a simple double tap on screen! If you use the tap to wake feature the app will display a black screen, so the screen is actually running. The battery consumption may be higher when activated! Do not use with LCD screens, OLED only!! The tap to lock feature can be used seperately and consumes no battery.

I liked this feature on my LG