A free program for Android, by yawei zhang.

This is a simple and very effective app for measuring your heart rate. The app is based on analyzing the blood flow on the tip of your finger. The app is free, simple to use, and very effective.

It is suitable for people of all ages, from children to adults. It is useful for people who are not trained athletes and for those who want to check their heart rate to see if it is normal or not.

The app uses your phone’s camera and will automatically detect the blood flow. The results are displayed in real-time. You can check your heart rate in real-time.