I tested the Whoop 4.0 and it might be the best fitness tracker out there - I tested the latest model and was surprised at ...

Wearing one on your arm keeps it out of the way, though, while still making it easy to attach the device's battery pack. If ...

The trial includes a new or expertly inspected pre-owned device, a battery pack, and a brand-new band (all covered by Whoop’s lifetime warranty). If it’s not for you, simply cancel and return the ...

The Whoop is a fitness tracker ... Even with the decrease in size, the 4.0 still has the same five-day battery life as its predecessor, the 3.0. I found I needed to charge twice a week so the ...