WEARABLES

The UP fitness band was supposed to be our future. We sold millions of them. But Fitbit sold tens of millions. And Apple was coming. We were stuck in the middle — too premium for mass market, too small for Apple.

We put a sleep lab on your finger. Heart rate, body temperature, blood oxygen, sleep stages — all from a ring. No wrist strap. No chest monitor. Just a ring you forget you're wearing.

Apple Watch tracks 100 metrics. We track 20. But we track them better because we're always touching your skin. A ring has 24/7 contact. A watch gets taken off. That's the difference.

I started Whoop as a senior at Harvard because I was overtraining and had no way to measure it. My body was breaking down and no device on the market could tell me why.