This app on the App Store is making $400,000 every single month, and in this video I show you how I recreated a MyFitnessPal-style fitness tracker in under 30 minutes using AI—without writing a single line of code. I build the whole thing with Rork: start from a blank project, prompt in the core structure (five tabs: dashboard, workouts, progress, community, profile), then iterate fast until the UI looks like a real, modern fitness product with proper visual hierarchy. After the “bones” are on the screen, I prompt in real functionality: workout logging with an exercise database, timers, reps/sets, progress charts, progress photos, body measurements, and AI-powered recommendations. Then I add the money-maker style feature: an AI fitness coach chat that gives personalized suggestions, form tips, and motivation based on goals and progress. I also give a real disclaimer: building apps and making money online isn’t easy, and I’m not promising results. But technically, this workflow is wild—Rork for the front-end and logic, Supabase for auth + data persistence, SQL tables for workouts/posts/profiles, and then you can share instantly via link/QR with Expo Go or publish to TestFlight/App Stores. The best app is the one that actually gets built and shipped.