Android is a multi-tasking system, and we always working in background. We can always check status bar to see notification of some system events. This app help you to set notification sound for some system events, so that you do not need to check your status bar every minute. Usually our eyes are much more busy than our ear, by assigning different notification sound, it make your eyes much more comfortable and relax. You can set the notification sound for screen on, screen off, system startup,