Downloadable mobile applications for auto tracking daily steps, burned calories, walking distance, duration and pace; Downloadable mobile applications for counting steps with built-in sensor, even when the screen is locked, whether user's phone is in his hand, his pocket, his bag, or his armband; Downloadable mobile applications for tracking user's fitness activity in detail and routes on the map with GPS in real-time; Downloadable mobile applications for auto recording user's steps; Downloadable mobile applications for recording user's health data; Downloadable mobile applications for displaying user's walking data in clear graph in daily, weekly and monthly statistics