Popsugar Culture Tech Tips How to Use iPhone's Hidden Sleep Timer I Didn't Know How Much I Needed This Hidden iPhone Sleep Timer Until It Became a Reality March 7, 2019 by Karenna Meredith First Published: March 5, 2019 View On One Page Photo 5 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 . . . You're All Set! Your music will play until the timer expires, but don't worry, it won't wake you up once it expires. Sleep well! Previous Next Start Slideshow