Some people need complete and utter silence to get a good night's rest, but others require a little white noise or some bedtime tunes to drift off to sleep. If you're part of the latter group, then pick your favorite sleeping playlist and settle in, because this iPhone hack is about to make your life easier.
Letting your phone play music while you're unconscious may seem like a battery-draining disaster, but in reality there's an easy workaround.
from POPSUGAR https://www.popsugar.com/tech/How-Use-iPhone-Hidden-Sleep-Timer-45854814
via IFTTT