The Apple Watch’s new Vitals app will only work properly if you wear it while sleeping, Apple says

Wearables

At its Worldwide Developers Conference (WWDC) in June, Apple lifted the lid on a new Apple Watch app called Vitals that’s arriving in watchOS 11. Designed to help you track your health metrics, and act on them, it was one of the more noteworthy new additions to the Apple Watch announced at the show.One thing that Apple didn’t mention, though, was that you’ll only get the full benefit of the Vitals app if you wear your Apple Watch while
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