all night, but that's not the full story. Sure, staring at a tiny screen for 18 hours a day probably isn't doing you any favors in the long run, but if you know what you're doing, your phone may actually help you feel more rested. Here are a few ways to use it, whether on its own or in tandem with some other nifty gadgets, to get a better night's sleep. https://www.thrillist.com/tech/nation/iphone-sleep-apps-and-gadgets-to-get-more-rest/tech