Whoop 4.0 review: The wearable that’s all about recovery

We’ve come a long way in the wearables world, from simple bands that track your steps through to fully-fledged smartwatches that will do absolutely everything. Tracking biometrics has long been an option, from the earliest Fitbit Flex through latest Apple Watch. Realising that some devices are just trying to do too much, Whoop offers a solution that, in execution, is more like the former, but in data, more like the latter.