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Apple sleep tracker series#

Core sleep is also called light sleep and is the stage when muscle activity lowers and body temperature drops.

REM sleep usually starts after 90 minutes or so after starting sleep.

REM is rapid eye movement sleep, and it’s the time when you are actively dreaming in your sleep.

Awake includes the time it takes you to fall asleep, as well as anytime you wake up during your sleep session.

With watchOS 9 and iOS 16, you also see your sleep stages for times awake and in these three separate stages: REM, Core, or Deep sleep.

Apple sleep tracker series#

And these changes might be enough that you don’t need a third-party sleep tracking app.įirst, there is no Apple Sleep app for your iPhone–it’s for Apple Watch only, and you must use at least a Series 3 that runs watchOS 8 to get the app.Īpple uses information from your watch’s accelerometer and heart rate sensor to gather sleep data, and that’s why you only get this data when you own and wear an Apple Watch when sleeping. The good news is that Apple really improved sleep tracking with watchOS 9 by adding sleep stages.

5 Is there a good free sleep app? Yes! Let’s look at Sleep ++ (free with ads, paid without ads)Īpple’s version of a sleep tracker is pretty minimal but getting better.3 Keep tabs on your sleep with Pillow (free and subscription plans).2 Track your sleep with AutoSleep (one-time paid app).1 Apple’s version of a sleep tracker is pretty minimal but getting better.