One of the changes for WatchOS 9 is the inclusion of the long-awaited sleep-tracking features, which will allow users to see how long they’re in each sleep stage. Users will see sleep stage data on Apple Watch in the Sleep app and can view more detailed information on their iPhones.

In addition, users will be able to track and manage their medications, vitamins, and supplements with the Health app. The medications feature will allow users to create a medications list, set up schedules and reminders, and view information on their medications in the Health app. The workout app was also improved to include features such as heart rate zones and new running metrics to track how efficiently you run.