Name: Apple Watch Series 9
Price: 329 USD

Pocket-lint

Apple Watch sleep tracking: What it does and how to use it

Everything you need to know about tracking your sleep with the Apple Watch, including how to set it up and what results you can expect.

Since watchOS 9 in 2022, Apple Watch sleep tracking has included stage tracking, providing more detailed information on your quality of sleep.
To track your sleep with Apple Watch, make sure you wear it to bed, turn on Sleep Tracking in the Watch app, and set the device to Sleep Focus.
You can customize Sleep Focus settings, view sleep tracking results in the Health app, and set up your sleep schedule on the iPhone.