watchOS 9 will include improved sleep tracking and medication reminders
Apple is at last promising better sleep tracking for Apple Watch as part of . The updated Sleep app will include a sleep stage function. It will be able to detect the REM, core and deep sleep stages and track those over time.
You'll be able to view your sleep metrics alongside other data, such as heart rate and respiratory rate, in the Health app on your iPhone. Those who participate in the health research program will be able to submit their sleep stage data to Apple Heart and Movement Study researchers.
One of the more…