A free app for Android, by RIVERSONG TECHNOLOGY CO. LTD.

RS Fit is a personal activity tracker and health companion app. With it, you can track your steps, calories burned, and other health information. In addition, you can keep track of the duration and frequency of your exercise sessions, monitor your heart rate, and record your sleep quality and duration.

It also includes an activity tracker to track the number of steps you take, as well as the number of calories burned and the amount of sleep you get.

The app can also track the number of hours you spend in bed each day.

This app is designed for use with smart wearable equipment from the brand.