Fitness approximation is like a guessing game. If you have a goal of getting fit, this game can help you get closer to it by guessing the number of steps you will need to take. For example, if your goal is to lose 10 pounds, you can estimate how many days you will need to exercise, or how many calories you need to eat in order to get there. The more detail you can provide in your guesses, the better chances you have of finding the actual number of steps you need to take.