A pedometer (also known as a pedometer) is, in short, a small aid that counts the number of steps that you take. A few thousand steps a day keeps the body healthy and smooth. You wear a pedometer on your belt, in your pocket or tied to your shoe. Do you want to measure your calories and sleep rhythm next to your steps? Then choose an activity tracker. These are narrow straps that you wear as a bracelet around your wrist. You often link these activity trackers to an app to analyze your data.