Thank you very much for using our product. This application is a companion application for our watches. This application can synchronize the steps, calories, mileage, sleep, and exercise records recorded by the watch. Your data display is more user-friendly and aesthetically pleasing. We will push phone and message notifications to your watch to prevent you from losing critical information (this feature requires your authorization). Supported watches: For the BIGGERFIVE watch series , if there is any further update support, we will update it in a timely manner. If you have any questions, feel free to contact us at any time. Thank you again for your use.