The main features of Yamaguchi Y-Watch application include: 1.Health data display: the application records data relevant to your physical condition such as steps taken, sleep hours, heart rate, calories burned, ECG, and SpO2, while also provides you with professional interpretations over these data; 2.Exercise data analysis: the application is also able to record while you exercise, and will display various data, including a detailed route and various exercise data analysis afterwards; 3.Smart d