I don't have an Apple Watch, so I don't have any experience with tracking sleep in the Health app. I did find the following articles that may, or may not, be applicable:
Estimating Sleep Stages from Apple Watch
Track your sleep on Apple Watch and use Sleep on iPhone
Discussion in Apple Communities re iOS 18 affecting sleep tracking. Specifically, see Sonar's and Cosmos1179's comments...
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On Mar 25, 2025, at 12:57?PM, jimrobertson via groups.io <jimrobertson@...> wrote:
I have central sleep apnea, for which I sleep using an ¡°ASV¡± (automated servo-ventilation) machine. Recently, for no reason other than ¡°I can,¡± I started using the iOS and watchOS ¡°Health¡± apps to track my sleep stages (light, deep, and REM), but it seems I must MANUALLY activate the ¡°Sleep¡± app on my watch in order for that to work. Is that how it should be? Both watchOS and iOS are current. My phone is a 14Pro and my watch is a Series 7 (GPS + Cellular). If I don¡¯t do that, my phone shows interrupted blocks of time all in turquoise color and DRAMATICALLY overstates my sleep time, including even times when I¡¯m up and walking around.
Has anyone else tried using this? It seems bizarrely inaccurate (again, unless the last thing I do when getting into bed is to MANUALLY trigger the ¡°Sleep¡± app on my watch.
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Bev in TX
