Track Your Sleep With the Apple Watch
The Apple Watch doesn't include any built-in sleep tracking, but you can install an app like AutoSleep 5 to get sleep tracking on your Apple Watch.
If you are comfortable wearing your Apple Watch to bed, you can install this app to get sleep tracking with everything taking place on the Apple Watch.
This app tracks your sleep quality, deep sleep stats and other data including how long it takes you to fall asleep.
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There are other apps out there, but AutoSleep 5 is one of the most interesting. It is $2.99 in the App Store.