This tools helps you compare the number of calories your body uses while sitting and while standing. I think it is very helpful at really letting you understand how much more you need to move (or less you need to eat) to reach balance in your calorie intake when you sit for extended periods of time.
Simply by standing you increase your metabolism because your body has to work harder to stand than to sit. You can take it to the next level entirely with a treadmill desk… or, by simply taking regular walks.
See the difference in calorie-burn. Over time it adds up!