A pedometer is a device that counts the number of steps a person takes. It typically uses a motion sensor to detect movement and can be worn on the waist, wrist, or carried in a pocket. Pedometers are often used to encourage physical activity and help individuals track their daily exercise goals. Many modern pedometers also include additional features, such as tracking distance traveled, calories burned, and even heart rate. Some devices connect to smartphones or fitness apps, allowing users to monitor their progress over time and set personalized fitness goals.