With a WHOOP health tracker, you get an accurate and extensive insight into your health and workouts. You'll get to know more about your stress level, sleep, and recovery time after working out this way, for example. You can find all your data in the WHOOP app on your smartphone. You can choose from 3 different subscriptions: WHOOP ONE, WHOOP PEAK, and WHOOP LIFE. You pay for a 1-year subscription including the activity tracker. After a year, you'll have to renew the subscription yourself. Note: you have to link a credit card to your account during the setup.