One Black Friday deal flying under the radar this year is a saving on a fitness tracker worn by nearly every global sports star you can think of.

The Whoop 4.0 is a brilliant discreet fitness tracker that doesn’t include a screen. It’s a distraction-free fitness tracker that can measure sleep, strain, recovery, heart rate, activity, stress, and more.

Whoop sponsors some of the world’s most famous athletes including Kansas City Chiefs QB Patrick Mahomes, Cristiano Ronaldo, Virgil Van Dijk, Beth Mead, Mathieu van der Poel, Sha’Carri Richardson, Rory McIlroy, LeBron James, Tiger Woods, and retired Olympic swimmer Michael Phelps.

If you’re trying to get in shape for 2025, you could find yourself in worse company, scroll down to find the best deals where you are.

Today’s best Black Friday Whoop deals in the US

Today’s best Black Friday Whoop deals in the UK

As we noted in our Whoop 4.0 review, this is a brilliant fitness tracker for true fitness enthusiasts. It comes with lots of health data and a big focus on recovery. It’s definitely more primitive in some ways – it doesn’t have a screen or any features you might find on an Apple Watch, say – but it’s designed to be as discreet and non-distracting as possible.

The focus on the strain exercise puts on your body, the quality of your sleep, and your stress levels will help you get the most out of your workouts and ensure you’re pushing your body to the limit, rather than over the limit.