Black Screen

This application was actually designed to display only a black screen on your device. Some utilities: - Save the device battery while it is not locked, like a screen saver. - Avoid unlocking the device with password several consecutive times and in a short time, just by switching between the apps; - Easily shows scratches on the screen; Some uselessness: - People bored using phones; - Fun, for example, saying that your cell phone is damaged, stuck or anything; Have fun!