WHOOP is a "human performance" technology company who specialize in wearable fitness trackers and coaching software. Its principal product is a fitness tracker that measures strain, recovery, and sleep.

With a WHOOP membership, you can now seamlessly and securely import the following data from the Withings app into the WHOOP app: weight, fat mass, lean mass, and segmental body composition. Get a more comprehensive view of your holistic health and make progress with your goals by incorporating Withings body composition nd weight treads alongside WHOOP!

More information here!