The Whoop 4.0 fitness tracker is designed to capture your key vital signs—blood oxygen, skin temperature, heart rate, sleep quality and more—continuously. Smaller than its predecessor, the Whoop 3.0, by 33%, but fitted with a more powerful sensor, the Whoop 4.0 has a four- to five-day battery life, Bluetooth capability, and is waterproof up to 10 meters.
Simply download the compatible Whoop app to access the in-depth insights into your sleep, training, and recovery. New with the Whoop 4.0, you can gain a picture of your overall health. An SPO2 sensor and skin temperature sensor measure your blood oxygen levels, skin temperature, and heart rate to see how you might be deviating from your baseline vitals because of stress or illness.
You can customize the look of your Whoop 4.0 with a variety of band, hook, clasp, and fast link slider color and finishes. It’s comfortable to wear, and is designed so you never have to take it off.
Whoop is unlike other fitness wearables in that you’ll pay a monthly membership fee—starting at $30 monthly for six months—and you’ll receive the band for free.