>>> Do you want to protect your eyes from extra brightness? >>> Do you want to hide your personal information like passwords inside dark layer while you are typing? >>> Do you want to use your phone at the darkness of night for long time without getting your eyes tired? >>> Want an app that saves so much battery power? >>> Are You Running out of Battery Charge Regularly? You don't need to see the full display always, Do you? only a part of the window is important in every moment. So you loose