星瀚运动 XSTAR Sports,through the steps, distance, speed, calories, heart rate, sleeping and other activities, and environmental conditions, temperature, height, air pressure, combined with the active record, using GPS positioning in the background, map track, and other functions, and write your steps, distance to HealthKit,show you the movement condition of the recently, is the escort of your healthy life, is the fitness experts around you!
Continued use of GPS running in the background can dramatically decrease battery life.