Hey Product Hunt 👋 I'm Mizuki, the solo maker behind ShuttleAI. I'm not the one struggling on court — it was watching teammates at my badminton club practice for hours and then leave without really knowing what to fix. Everyone was training hard, but "hard" isn't the same as "focused." No coach, no objective feedback, just vibes and repetition. So I built the AI coach I wished they had: log your practice and get feedback grounded in your actual goals and history (not generic tips), get your swing analyzed via on-device pose detection, get an AI-generated menu for today's session, and even get tactical breakdowns of rally footage. The hardest part by far was the AI feedback itself. Getting Claude to go from "sounds like coaching" to "actually gives you something to fix tomorrow" took a lot of prompt iteration — feeding it goals + practice history + category-specific context until the advice felt specific enough to act on, not just encouraging fluff. Still very early and solo-built, so I'd love to hear what you think — especially if you play badminton yourself. What would you want an AI coach to catch that a human coach usually does?

Shuttle AI

Practice logs + AI coaching: get better at badminton

Practice logs + AI coaching: get better at badminton