FitWit AI

apps.apple.com/us/app/fitwit-ai-personal-trainer/id6757002413 →

AI fitnessApple WatchMeal trackingIndie deviOS

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A solo dev 'vibe-coded' an AI fitness app — and it actually shipped

WHAT IT SOLVES

Tracking workouts in one app, meals in another, and neither talks to your Watch — most people just quit

WHY IT'S INTERESTING

★ Product taste

Workouts + meals + Watch — in one app

Most fitness apps pick a lane — either workouts or nutrition. FitWit does both, adds photo-based food logging via AI, and syncs with Apple Watch for heart rate and exercise tracking. It's one closed loop, which is how fat loss actually works

★ Real craft

Watch support isn't a checkbox feature

Adding Watch support means HealthKit permissions, sensor APIs, foreground/background sync — it's a real engineering surface area. The author literally called it 'vibe coded,' meaning no formal architecture, just building as he went. Shipping something that works well enough to earn a 5.0 rating? That's real hands-on skill