Rally

Rally is an AI activity coach that turns plain language into logged workouts. Problem: fitness apps make logging tedious (endless forms), give generic plans, and aren't fun — so people quit. Rally fixes this with a conversational coach: say "I played tennis for an hour yesterday evening" and it streams a reply, drafts the session with a transparent calorie estimate, and saves it on confirm — nothing saves until the user taps Confirm. It also drafts training weeks, finds and books courts, runs friend matchups with shareable invite links, and grows a virtual pet that reacts to real activity (streaks, variety, rest). All personal data stays on-device in the browser; the server keeps no activity history. Live at https://rally-7wwb.onrender.com/ (FastAPI backend + React PWA, deployed on Render; see the 3-minute demo video).