Whoop 4.0 Fitness Band

Whoop 4.0 is a fitness tracker with no screen that sits on your wrist and collects heart rate, sleep, and strain data continuously. You can only see your numbers through the phone app, which means the device disappears into your daily routine. Garmin and Apple both make watches that do similar tracking but they also show notifications, weather, and messages, making them attention magnets. Whoop's decision to remove the screen is a design choice about what health data is for, which is long-term trends rather than moment-to-moment checking. The band costs $30 per month as a subscription with no upfront hardware cost. The app gives you a daily recovery score that tells you how ready your body is for exercise. That single number answers "should I work out today" without requiring you to interpret graphs.