I built CoachAI because of a gap I kept watching in gyms: people show up consistently, train hard, and still get hurt or plateau — not because they lack discipline, but because nobody is watching how they move. trainers are expensive or don't fit into the schedule. Most people just guess.
So the core question became: can a phone actually see a bad rep?
Turns out yes. CoachAI uses the iPhone camera to track your movement in real time and tell you when your form breaks down — all on-device, nothing uploaded. Around it sits a program engine that adjusts properly instead of shuffling random exercises.
The biggest shift in my process was order of operations. My original onboarding asked for goals, height, weight, injuries — five screens before you ever saw the thing that makes the app different. People bounced. I've since flipped it: you do one tracked rep first, then we ask questions. Show the magic, earn the form fill.
On process: I shipped this before I was comfortable. There are rough edges I'd normally have spent another three months sanding down in private. But a polished app nobody has used is just a very expensive opinion. I'd rather have real people telling me what's wrong than keep guessing on my own.
Still early, still rough in places. If you try it, I want the harsh feedback — especially on the tracking accuracy.
Try it and see if it catches your form breaking down. That's the part I'm proudest of, and the part I want people to try out.
iOS 17+, free to start: https://apps.apple.com/app/coach...
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