Sleep monitoring in watchOS 9 delivers a lot more insights Using the introduction of slumber phases. Apple Watch utilizes indicators from the accelerometer to estimate when buyers are in REM, Core, or Deep rest. One thing I am able to say needless to say may be the watch band matters, https://why-strap-for-apple-watch64218.csublogs.com/32720779/5-tips-about-invicta-watch-band-remove-link-you-can-use-today