VeryFit2.0 main functions include check exercise, monitoring the sleep quality, intelligent alarm clock wake up, etc. Application of real-time view through physical activity and calorie consumption, monitoring the effect of walking and running. When VeryFit2.0 entered the sleep state monitoring, record the deep and shallow sleep, then sleep time, sleep help users to monitor their sleep quality. Because the application needs to implement the background to remind, so has been running in the background.