https://techcrunch.com/2020/06/22/the-apple-watch-can-soon-track-sleep/

Apple just announced a long-requested feature to the Apple Watch. Sleep Tracking. With this new feature, users can not only track sleep but create what Apple says is a holistic approach to improving sleep.

The sleep tracking function works in conjunction with an iPhone to help a person create a better sleep routine. This feature is called Wind Down and is designed to reduce distractions on the iPhone and Apple Watch. When activated, the phone displays additional information on the lock screen, including how long it is left until bedtime (pre-set by the user) and turns on Do Not Disturb. This screen prompts users to relax and meditate — instead of, you know, endlessly scrolling Reddit. When it’s time to wake up, the alarm screen has been reworked and now features a link to Shortcuts, making it easier to launch daily apps.