How can I measure my heart rate?
Slide to the left on the watch face to enter heart rate, and then you can start to measure your heart rate. During measurement, it's required to properly wear the watch and keep the back of the watch fairly close to your skin until the watch can measure a stable heart rate.
If you want to turn on the all-day measurement function, open the Amazfit app and enter "My – Amazfit GTR – Heart Rate detection" and choose to turn on Automatic heart rate detection
Notes: With the all-day measurement function on, the watch will measure the heart rate at regular time. Sliding right on the watch face can make the last heart rate value visible. You can enter the all-day heart rate details page by tapping it.