Knock Knock Screen is an Android application developed by Emre Ardıç. This free app falls under the Utilities & Tools category and offers a unique way to wake up your device. By simply knocking twice on a flat surface near your phone or over the screen, you can activate your device.

To use Knock Knock Screen, you need to activate the application by pressing the power image in the main interface. Once activated, a notification will appear, and you can open or close the app at any time from the main UI. The app then runs in the background and listens for vibrations around your phone.

It's important to note that long usage of the app may result in battery drain, as it constantly listens for knock knock vibrations. However, if you're looking for a convenient and hands-free way to wake up your device, Knock Knock Screen offers a simple solution.