(It also has a $5.99 subscription fee.) $349.00 Amazon WHOOP 4.0 with 12 Month Subscription Our Take The Whoop strap can track both cardio and strength activities, and offers coaching advice on ...

Whoop's approach to handling sleep and fitness tracking stands out since its bands don't come with a screen. All the product does is sit on your wrist and track fitness data — which you can then ...