Why has my Sleep Data stopped? No changes were made on my part. In opened Sleep Summary, Add Data shows In Bed checked and Starts/Ends are both current time and attempts to correct setting fails. Any suggestions??
iPhone X
Hello janeko70,
You will need an Apple Watch to record Sleep Cycles. Your iPhone isn't capable of recording REM, Deep, Core, Awake sleep cycles, only an Apple Watch is.
If you have an Apple Watch, make sure you wear it to bed! You will need at least an Apple Watch Series 4 updated to watchOS 9. Apple Watch Series 3 and watchOS 8 and below do not support sleep cycles.
I hope this helps!
Health App - no Sleep data/only In Bed data
