How WHOOP works

The science behind better performance

The WHOOP device and app work together to turn your data into clear, personalized coaching. Get daily guidance to make informed decisions, build healthier habits, and improve your long-term health.

The metrics that matter most

Sleep quality quantified

WHOOP tracks all four stages of sleep — slow wave sleep (SWS), REM, light, and awake — with near-perfect accuracy. Each stage serves a different purpose in your recovery.

What to expect

Your WHOOP calibrates to you—because no two bodies are the same. It analyzes your data, builds a personal baseline, and delivers insights tailored to your unique physiology.

Establish your baseline

From the moment you put on WHOOP, it begins measuring key health metrics like sleep, strain, recovery, and heart health. Right away, you'll see insights on your heart rate, respiratory rate, steps, and stress.