A built-in sleep monitor tracks your quality of sleep. A built-in heart rate sensor tracks your heart rate (please make sure your device has a built-in Heart Rate Sensor) Integrates with iOS Health App. Powered with multi-sport functionality, our sport smartwatch lets you choose from a series of activity types such as running, biking, walking, hiking, trail run etc… In addition to its training functions, our sport smartwatch will also notify you when receiving incoming calls, text messages or social networks notifications.