My wife is just getting started on whoop and I forget how long my whoop took to calibrate. I remember it being a few days, but I don’t remember.
Whoop takes 4 days for initial calibration, where you’ll start seeing recovery scores. Full baseline calibration takes about 30 days of consistent wear. This allows whoop to learn your unique HRV, RHR, sleep, and strain patterns for more personalized insights. The big benefit to whoop is you can wear it 24/7 (which gives you the best results obviously b/c theres no gaps in data).