Whoop

Wearable health and fitness tracker that provides continuous monitoring of various health metrics, including heart rate, sleep, calories, stress levels, exercise duration, and blood oxygen saturation. The latest model, Whoop 4.0, is compatible with Android and iOS devices and typically comes with a subscription service for extended use, differentiating itself with its comprehensive data analytics and personalized insights. Whoop is primarily targeted at athletes, fitness enthusiasts, and individuals seeking detailed health and performance tracking.