There are new watch faces, an enhanced workout app, sleep stages, a first-of-its-kind AFib history feature, a redesigned compass app, and an all-new medication app.

Apple today introduced watchOS 9, which brings new features and improved experiences to the world's leading wearable operating system.

Apple Watch users now have more watch faces to choose from, richer complications that provide more information and opportunities for personalization.

In the updated Workout app, improved metrics, views, and training experiences inspired by high-performance athletes help users take their workouts to the next level.

The Sleep app includes sleep stages, and for users diagnosed with atrial fibrillation (AFib), the new FDA-cleared AFib history feature provides deeper insight into the user's condition.

The new Medication App makes it easy for users to manage, understand and track medications conveniently and discreetly.