WHOOP monitors your sleep, recovery, and daily effort around the clock to deliver actionable insights on how you can optimize your performance.
The all-new WHOOP 4.0 is smaller, smarter, and designed with new biometric tracking, including skin temperature, blood oxygen, and more.
Comfortable enough to wear non-stop thanks to new, durable SuperKnit bands, but flexibly designed to be worn off your wrist in new WHOOP Body apparel.
Set a haptic alarm that gently vibrates to wake you at the optimal time based on your sleep needs and cycles.
A robust sensor suite allows you to monitor your key vital signs: Blood oxygen levels, skin temperature readings, and heart rate metrics.
5 LEDs and 4 photodiodes capture your data more often than most wearables, providing best-in-class accuracy validated in lab studies and with third-party testing.
Wirelessly charge your WHOOP with a waterproof* battery pack and capture data continuously—even while in the shower or washing dishes.
The Health Monitor gives you a big-picture look at your overall health.**
Monitor key metrics like heart rate, resting heart rate, heart-rate variability, skin temperature, and blood oxygen levels, to better understand your body’s overall health.
WHOOP calibrates to your individual baseline. Know when you’re within normal range and get alerts when you deviate.
Export 30 or 180-day health data trends into a PDF that you can share with your coach, trainer, PT, PCP, or physician.
The WHOOP app delivers personalized insights and actionable feedback based on your unique data, behaviors, and goals.
Take the guesswork out of your training with Strain Coach. Based on your recovery, you’ll get a daily target exertion goal to help avoid overtraining and undertraining.
WHOOP measures your sleep patterns and debt, so you know how much sleep you need and when to go to bed. Sleep Coach can even wake you when you’ve reached optimal recovery.
Track your daily behaviors like diet type, stress levels, caffeine intake, and more to understand which behaviors impact sleep and recovery most.
We believe everyone has an inner potential. A potential to perform at their highest level. We believe this potential can be harnessed by uncovering secrets your body is trying to tell you.
As humans, we wander through life with remarkably little information on how our bodies are performing. As my co-founder John used to say, “I can predict the weather next week, I know detailed health and performance metrics of my computer, but I don’t know when I’m going to get sick or how hard I should workout today.” Why are you tired, sick, injured, fatigued? What sequence of actions (or lack thereof) led to that state? Conversely, why are you peaking physically, alert, primed…in the flow state? How can you get back there? Stay there?
I grew up loving sports and exercise. Many of my childhood heroes were athletes. I was recruited to Harvard and became Captain of the Men’s Varsity Squash Team. As a D1 athlete, I was amazed by how little I knew about my body. I would train for 3 hours a day with my teammates without knowing what gains I made, I was surrounded by athletes, myself included, who overtrained, misinterpreted fitness peaks, underestimated recovery and sleep, and got injured. Being prepared for game day often seemed… random.
I became inspired by a simple idea: Humans, especially athletes, could optimize their daily performance. Optimizing performance was not a random sequence of events and decisions, but rather a systematic approach to understanding your body.
The Whoop fitness tracker measures HRV by analyzing the variations in time intervals between consecutive heartbeats. HRV is a useful indicator of your body's autonomic nervous system activity and can provide insights into your stress levels, recovery, and overall health. Higher HRV is generally associated with better fitness and readiness for physical activity, while lower HRV may indicate increased stress or fatigue.
Yes, the Whoop tracker is water-resistant and can be worn during swimming and other water-based activities. It is designed to withstand water exposure and track your performance accurately in aquatic environments. However, it is important to note that the tracker is not suitable for deep-water activities such as diving, as it has specific depth limitations.
The battery life of the Whoop fitness tracker typically lasts around 3-5 days, depending on usage. The device comes with a charging cable that allows you to easily recharge it. The Whoop app also provides battery status information, so you can keep track of the remaining battery life and plan your charging accordingly.
October, 2025
Monday
August 26,2019
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