Knock twice as if you knock a door near your phone or over screen to wake up your device. Phone must be on a flat surface transmitting vibrations like table. To be able to detect knock knock, firstly you must activate application by pressing power image in main interface. Notification appears when the app is activated. You can open or close it any time in main ui.
This download is totally secure. Emre Ardıç is the creator of the app which refers to the Tools category. Over 1K users downloaded Knock Knock Screen and its latest update was released on Sep 19, 2015.
People rated this application 2.9 on Google Play. Download the free installer of Knock Knock Screen 1.0 and read users' reviews on Droid Informer. The app can be launched on Android devices 4.0.3 and higher.