JR Smart app integrates HealthKit to read and write some data in the Health app.  
JR Smart is mainly used to connect the Bluetooth bracelet to assist users. Record and display the user's exercise and health status in real time, including information such as heart rate, sleep and exercise. At the same time, it provides users with basic settings such as bracelet reminders, device search, and factory reset.
【Warm Prompt 】
Running track function will continue to use GPS positioning service, switch to the background can still keep running track record, compared to other operation consumes more electricity, will to a certain extent, affect the battery life.
Note: Continued use of GPS running in the background can dramatically decrease 'life.