A Wearable Health Sensor is a small device that is worn on the body, usually as a bracelet or watch, which is designed to monitor and track health-related metrics such as heart rate, breathing rate, and activity level. These sensors are often connected to a mobile app, allowing users to track and view their health data in real-time. Wearable Health Sensors have become increasingly popular and are used by athletes, medical professionals, and individuals looking to improve their health.