I really like the built-in "Workout" function of the Band. It tracks the duration and heart rate of a fitness workout, or any activity I choose. No other software is needed - the Band computes burned calories and fat, recovery time, average and peak heart rate, and duration. No third party software is needed. If you want to walk the mall, climb the stairs at your office, go grocery shopping, work out at the gym, or some other fun recreation , activate the Band display (left button), scroll to the dumbbell icon, and tap the right button. When you are finished, tap the right button again.