Fitness monitors are wearable devices that track and monitor various aspects of physical activity and health. These devices typically include features such as step counting, distance tracking, heart rate monitoring, and calorie expenditure estimation. They are designed to help individuals stay motivated, set goals, and track their progress over time. Many fitness monitors also offer additional features such as sleep tracking, GPS tracking, and smartphone notifications. The data collected by these devices can be synced to a smartphone or computer, allowing users to analyze their activity levels and make informed decisions about their health and fitness. Overall, fitness monitors are a popular tool for individuals looking to improve their physical fitness and maintain a healthy lifestyle.