watchOS 9 will include improved sleep tracking and medication reminders

Apple is at last promising better sleep tracking for Apple Watch as part of watchOS 9. The Sleep app will add a sleep stage function. It will be able to detect the REM, core and deep sleep stages and track those over time. Those who participate in the Apple health research program will be able to submit their sleep stage data to researchers for a new study.

One of the more notable health features for watchOS 9 is that it will show how long a wearer is in a state of atrial fibrillation (AFib) if they have been diagnosed with the condition. The new feature will show the time of day or week that AFib is most active.

You'll receive weekly notifications to help you gain a better insight of AFib frequency. The Health app will show a detailed history, along with indicators of lifestyle factors that may impact the condition, such as exercise, sleep and alcohol intake. You'll be able to download a PDF that includes your aFib history and possible lifestyle factors to share with your healthcare professionals.

Apple Watch's electrocardiogram (ECG) tool can look for signs of an irregular heartbeat or AFib. The US Food and Drug Administration just granted Apple approval last week for an ECG history feature. 

In addition, Apple is introducing a Medications app to help users keep track of when to take their meds.

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[original story: Engadget]