The APP is the design of Shenzhen Polucy Smart TechnogyCo.,Ltd, is connected with the YO-WATCH smart watches, you can achieve the following functions: 1.UV monitoring, timely understanding of outdoor ultraviolet intensity; 2 remote control self timer, shaking the watch to self; 3 sleep monitoring, sport pedometer; 4 call reminder; 5 automatic calibration time other functions, more features continue to update!