Wearable fitness tracker
WHOOP
by WHOOP
wearable fitness recovery strain sleep hrv performance screenless
About this product
WHOOP is a screenless, subscription-only wearable that continuously tracks HRV, resting heart rate, respiratory rate, sleep, and physical strain. It synthesises metrics into a Recovery score and Strain score to guide training decisions.
Subscription is ~$30/month; the hardware is provided free with membership. Popular among athletes and performance-focused individuals.