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GhostRep

Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

Demo video · www.youtube.com/…

GhostRep turns ordinary workout videos into personalized movement insights. Its core idea is simple: your best rep becomes your coach. Fitness apps track sets and reps, but understanding how your movement changes often means reviewing videos without useful context. GhostRep compares repetitions against your own observed reference rep, helping you see differences in movement and timing. Meta Muse Spark generates personalized weekly training plans and powers a coach that explains saved workout evidence. SAM 3.1 creates athlete outlines for visual comparison, while MediaPipe and local algorithms track joints, detect repetitions, and align movement phases. Users can plan workouts, log sets, explore visual comparisons for supported movements, ask follow-up questions, and review suggested next-set adjustments before accepting them. GhostRep helps lifters understand their movement and make more informed training decisions through feedback grounded in their own performance.

Team