1. You don’t need to keep the Bluetooth on for the following functions: steps, sleep monitoring, heart rate detection, stopwatch, alarm clock, and sedentary reminder.
Just wear a device when doing a workout, and open the app after you complete the workout. The smart device and the mobile phone will be automatically connected, and you can view the data after sync is finished.
2. Regarding the functions of call reminders, app notifications, find mobile phone, find the smart device, etc., it is required to keep connected with the device and leave the phone Bluetooth turned on all the time.