Apple is developing a screenless health and fitness wearable tracker similar to Whoop, responding to rapid growth from competitors like Whoop and Oura that are capturing millions of users. The prototype is in early exploration phase with high-level executive backing, but unlikely to launch before 2028. Meanwhile, Apple has already begun incorporating Whoop-like features (readiness scores, biological age tracking) into recent Apple Watch models and a redesigned Health app, showing immediate competitive pressure in the fitness tracking space.