Goodbye Stone Age pedometer, hello best fitness watches! There are more ways this fitness device can do, that includes tracking heart rate, the number of steps taken, type of workout, the intensity of exercises, distance covered, calories burned, body temperature, and etc. There are other extra features a fitness tracker can have, such as being shock-proof or even waterproof. You may even take it to camping or during off-the-grid activities. By 2016, hundred millions of people are already on the fitness tracker. So, why don’t you?