Hello! It is very convenient to track personal health indicators with the help of fitness trackers, so such devices are popular! Anyone who wants to receive very accurate data on the functioning of the body can pay attention to the Whoop device, which has proven itself to be excellent. To learn more about this device and see all its advantages, everyone can read reviews here
https://whoop.pissedconsumer.com/review.html and perhaps someone will decide to buy such a fitness tracker for themselves.