The main functions of Runmefit include: find bracelets, music control, finding mobile phones, remotely taking pictures, message notifications, and call reminders. For these functions to work correctly, you need to allow the application to access the phone's SMS and call history permissions. The core function of Runmefit is to communicate with intelligent wearable devices to have message notifications and phone reminders, etc. Without this core function, the application will not usually work.