spina - Fix your posture while you work. Privately, on-device.
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A small mac app that watches your camera locally and nudges you when it's time to sit up. No cloud, no subscription, no account. One-time purchase.
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Maker
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Hey Product Hunt 👋
I'm a solo dev who spent the last year hunched over Claude Code shipping side projects. My back finally said enough. I tried every "sit up straight" reminder app — they're all either annoying timers that have nothing to do with how I'm actually sitting, or web apps that want my camera feed in a browser tab forever.
So I built Spina.
It lives in your menu bar, watches your posture through the webcam at 2 FPS, and nudges you when you slouch. Everything runs on-device via MediaPipe — no video is recorded, no frames leave your Mac, no account needed.
A few things I'm proud of:
- Mirror Mode — see yourself with posture overlay when you want feedback
- Calibration to your specific desk setup, not some generic ideal
- Weighted scoring across 4 metrics with hysteresis, so it doesn't false-positive every time you turn your head
It's a one-time purchase (no subscription nonsense for a menu bar app).
Would love feedback from anyone who codes/designs all day. What would make this a daily-use tool for you? AMA below.
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