Fitbit Charge 2

Fitbit's original Charge quickly became it's most popular product. So the Fitbit Charge 2 has a lot to live up to. It does so by adding improvements like estimated VO2 Max readouts that leverage the continuous hear rate tracking, built-in guided breathing sessions to help you relax, sport-specific modes to track workouts like runs, weights, biking, and yoga, and an interval workout mode. It also links to your phone to add GPS data to your workouts, has a larger tap-sensitive display, and easily interchangeable bands to let you change the look as often as your clothes.