Whoop’s bracelet-style trackers offer more comprehensive activity tracking and biometric data than standard fitness trackers. The Whoop band is also an excellent tool for monitoring sleep and overall health. Our WIRED testers have been reviewing Whoop trackers since Whoop 3.0 and have watched the product evolve into an AI-enabled, personalized service.

But for most people, Whoop may feel like an overinvestment, which is why it is particularly popular among elite athletes. The company's tiered subscription model can also be quite expensive for devices that are not medical instruments. Nonetheless, in the realm of biohacking, the gamification of health tracking is quite appealing. If you're on the fence, we have a Whoop promo code and Whoop discount here, including a free trial before you commit to a purchase.