watchOS is the operating system designed specifically for the Apple Watch. It allows users to access apps, track fitness activities, and receive notifications right from their wrist. With a user-friendly interface, watchOS makes it easy to check the time, monitor health metrics, and stay connected without needing to pull out a phone. One of the standout features of watchOS is its focus on health and fitness. Users can track workouts, monitor heart rates, and even receive reminders to stand or move throughout the day. This makes watchOS not just a smartwatch, but a valuable tool for maintaining a healthy lifestyle.