OnlyFit

OnlyFit is a comprehensive, unified, and easy-to-use experience that integrates the data and services of the company's products. You can view the daily movement data / track, sleep, calorie consumption, weight information, heart rate and so on. In addition you can customize to receive shout notifications for each application, and you will no longer miss any notifications, phone calls and messages!

Use of health data
OnlyFit is likely to synchronize data in Apple's health applications