Free browser-based virtual cycling app with structured workouts, track cycling, and mini challenges. Runs entirely in the browser, connects directly to smart trainers, and has no install or subscription. 100+ free workouts, 18 real-world inspired velodromes, challenges engine. RideCave uses real Newtonian physics and millisecond accuracy, fun stats, works via Web Bluetooth (Chrome/Edge), and keeps data local by default. Built by a cyclist who wanted track workouts without a $20/month sub.