Fitness trackers from brands such as Apple, Fitbit and Samsung now come with heart rate monitors – but do they accurately measure your active heart rate?
Fitness trackers are popular for good reason: They give you an around-the-clock look at your health, from how much you're exercising to how well you're .
LETSCOM Fitness Tracker HR, Activity Tracker Watch with Heart Rate Monitor, Waterproof Smart Fitness Band with Step Counter, Calorie Counter, Pedometer .
Our line of activity trackers and smartwatches helps you track your activity, then save,. . Smart activity tracker with wrist-based heart rate, GPS and color display.