Baseball Training App

Overview: I'm building a native mobile app for my baseball hitting coaching business, K Huck Hitting. I need an experienced React Native developer who can build a polished, full-featured coaching app on iOS (Android secondary). I have detailed wireframes, a full feature spec document, a working HTML prototype, and a web-based app already built to reference — you'll know exactly what to build from day one. The App Has Two User Roles: Player — records swings, tracks progress, completes programs, logs nutrition, and books sessions Coach (me) — reviews player clips, sends feedback, manages athletes, and controls my schedule Core Features to Build: 1. Swing Camera & Video Analysis (highest priority) Native camera with auto-detect swing technology using the device accelerometer Auto-trim and save each swing clip to a personal library Slow motion playback with frame-by-frame stepping Side-by-side video comparison with synced playback Drawing and annotation tools on paused frames (lines, arrows, circles, angle tool, color picker) Coach feedback flow — player submits clip, coach leaves text or voice note, assigns drill 2. Session Scheduling Players browse my available time slots and book directly in the app I set my own hours, block dates, and manage my calendar Automated confirmations and reminders sent to players Stripe integration for session payment at time of booking 3. Hitting & Lifting Programs Coach builds custom programs for each player Tabbed workout interface (Movement Prep / Med Ball / Hitting Plan / Lifting) Players check off exercises and log sets and reps 4. Nutrition Tracking & AI Players log daily meals and track macros (protein, carbs, fats, calories) AI-powered nutrition engine calculates personalized daily targets based on height, weight, age, and goal (build muscle / maintain / lose fat) Targets automatically adjust as the player updates their weight over time Food search with macro database so logging is fast Daily summary dashboard showing progress toward all macro and calorie goals Coach can view player nutrition logs alongside their training data 5. Game Log Players log every at-bat with pitch tracking and result Stats dashboard showing trends over time 6. Community Feed — The Dugout Coach posts tips, drills, and content Players can comment and react 7. Direct Messaging Coach to player messaging built in Tech Requirements: React Native (Expo or bare workflow) Developer recommends and justifies the backend — must be secure, scalable, and something you have shipped with before Stripe for payments and billing AI integration for nutrition engine (your recommendation) Must be submittable to the App Store What I'll Provide: Fully functional web-based prototype of the app covering swing camera, video analysis, coach review, side-by-side comparison, and annotation tools — ready to reference for design and functionality Full feature spec document Working HTML prototype of the swing camera feature Brand guidelines and design direction Fast response time — I won't slow you down Looking For: Someone who has shipped React Native apps to the App Store before Show me examples of video or camera-based apps and booking or scheduling apps you've built Fixed price or milestone-based preferred US-based preferred but open to international with a strong portfolio