FitnessAI

FitnessAI is a gym workout app from FitnessAI Inc. that builds personalized strength training programs and adjusts them automatically as a user logs sessions. Its recommendations are based on an internal algorithm trained on a large base of real logged workouts, and the app updates set, rep, and weight targets after each session rather than following a fixed program. Sessions can be set anywhere from 5 to 30 minutes, and the app adapts exercise selection to whatever equipment is available, whether that's a full gym, home setup, or travel with no equipment. Beyond programming, FitnessAI includes video-guided form instructions for each exercise, progress tracking with 3D body composition visualization, structured fitness challenges, and Apple Watch integration for syncing workout data. It is available on iOS and Android and reports over 5 million downloads, 500,000 active users, and more than 100 million completed workouts logged through the app. FitnessAI is aimed at people who want an adaptive, data-driven training plan without hiring a personal trainer. The app is free to start, though the homepage does not list specific pricing tiers for any premium features beyond a partially obscured discount code, so full costs aren't clear without opening the app.