The Short Version
WHOOP's beta Memory feature lets users manually log context like injuries or stress so coaching advice goes beyond what sensors alone can detect.
WHOOP's Memory feature lets users type in things no sensor can measure, like a nagging knee injury or a brutal work week, so the app's coaching advice reflects actual life instead of just heart rate and sleep data. The catch is obvious: the feature only works if users keep feeding it information. Sensors run automatically, but Memory requires effort, and most people will forget to update it the moment life gets busy. WHOOP is essentially asking users to become their own data entry clerks.