Will my alarm sound when the iPhone is on silent / mute?
Muting all of the alerts and noises generated by iOS 7 on the iPhone can bring peace and quiet. But does putting the iPhone into silent mode prevent alarms from going off?
Rest assured, when an alarm is set with the stock Clock app, it will sound even if the iPhone ringer is off. That means you can safely mute other sounds and still count on the alarm to go off at a preset time.