A digital caliper is a good way to keep track of your body fat. With a caliper, you can measure body fat and keep track of your new diet or workout routine. This way, you will know the difference between muscle and fat, and not have to rely as much on the scale. A digital caliper is great in the sense that it is able to take an accurate reading in seconds, give you a clear output and beep when it is ready. A digital caliper can also be programmed with your personal gender and other information so that you get a more accurate reading.