Alarm Clock is designed as a nightstand companion. Set the alarm, choose a wake up sound from your own library, and customize the clock with your own colors or backgrounds. Please note: best results are obtained by leaving your device plugged in, leaving the application in the foreground, and ensuring that the power settings are NOT set to sleep or hibernate your device. If your device turns off, the Alarm Clock will not sound. If Alarm Clock runs in the background, your alarm will not sound. You will receive a 'toast notification' that your alarm is going off, but it's not going to be loud enough to wake most people.