Mobile App Developer (Convert Existing Base44 Web App Into iOS + Android App)

Budget: $2,500–$5,000 USD Project Type: Fixed Price Timeline: 4–6 weeks Looking For: Senior Mobile App Developer (Flutter / React Native / Capacitor) with experience converting web apps into full mobile apps and integrating Health APIs. ⸻ PROJECT OVERVIEW I have an existing web application built on Base44, which includes: • A fully designed and functional front-end UI • User authentication • AI-driven logic (based on body type, BMI, blood type, etc.) • Database already set up • Smooth, fluid, modern user experience The web version is clean, fast, responsive, and production-ready. ⸻ WHAT I NEED BUILT I need this web application converted into a mobile app that is: • Published in the Apple App Store (iOS) • Published in the Google Play Store (Android) • Retains the same UI/UX quality • Fluid, user-friendly, modern • Uses my existing backend + Base44 APIs • Structured for future integrations (wearables + offline-first) This is Phase 1 of the project. Future phases will expand functionality, but Phase 1 MUST be polished and professional. ⸻ SCOPE OF WORK (PHASE 1) 1. Mobile App Build • Convert my existing Base44 web application into a downloadable mobile app • Framework can be Flutter, React Native, or Capacitor (developer may choose) • App must: • Load my Base44 screens • Maintain all UI animations and flow • Support portrait mobile design • Load fast and feel native ⸻ 2. Native Mobile Features Include in Phase 1: • Splash screen • App icon + branding • Navigation transitions • Smooth screen rendering • Basic local caching (recent screens load even with poor connection) • Deep linking setup • Analytics setup (basic) NOT included in Phase 1 (but must be architected for Phase 2): • Full offline-first sync engine • Deep wearable integrations (Apple Watch app, Fitbit app, sleep tracking, etc.) ⸻ 3. Light Wearable Integration (Phase 1 – Optional “Basic Sync”) If the budget allows, include: • Apple HealthKit basic read permissions • Steps • Active energy • Resting heart rate • Google Fit basic read permissions (same metrics as above) → The developer must map these values to my Base44 backend through secure API calls. No advanced wearable features needed yet. ⸻ 4. Backend Integration The app must connect to: • Base44 authentication • Base44 API endpoints • Base44 database connections • AI recommendation endpoints (already built) No backend rebuild. No new database. No re-architecture. The developer only connects the mobile app to the existing system. ⸻ 5. App Store + Play Store Deployment Developer must handle: • App Store Connect setup • Google Play Console setup • Signing keys • Certificates • TestFlight • Play testing • App submission • Fixing Apple rejections if required I will supply: • Developer accounts • Branding assets • Screenshots and marketing copy for app listings ⸻ DELIVERABLES By the end of Phase 1, I must receive: 1. iOS App (TestFlight + ready for App Store submission) 2. Android App (ready for Play Store submission) 3. Full source code 4. Documentation • How the app connects to Base44 • How wearable sync is implemented (if included) • How to update builds in the future 5. A fully functional mobile app that mirrors my existing Base44 UI 6. A future-ready architecture to support: • Deep Apple Watch + Fitbit integrations • Offline-first capabilities • Advanced activity/wellness scoring ⸻ REQUIRED EXPERIENCE Only apply if you have proven experience in: • Converting web applications to mobile apps • Flutter, React Native, or Capacitor • Apple HealthKit / Google Fit integrations • API integrations • Offline caching systems • Publishing apps to Apple App Store + Google Play Store • Creating highly polished, fluid UI/UX Please include: • Links to past apps you’ve built • Examples of web-to-app conversions • Experience with health/wellness apps • Your recommended tech stack and why ⸻ WHAT SUCCESS LOOKS LIKE • The app feels native, not like a cheap wrapper • UI is fluid, fast, modern, beautiful • App experience = same quality or better than current Base44 web app • Users can log in, view programs, track wellness, interact with AI • App is stable, polished, and ready for real clients • The architecture prepares us for deeper Phase 2 integrations ⸻ PAYMENT MILESTONES Milestone 1 (20%) — Project architecture + mock build • Developer shows app shell loading Base44 login screen Milestone 2 (40%) — Full app screens functional • Navigation + UI implemented • Backend connected Milestone 3 (30%) — Wearable basic sync (if included) • Apple Health + Google Fit simple metrics integrated Milestone 4 (10%) — App Store + Play Store submission • Ready for publishing • Final QA + bug fixes ⸻ NEXT STEPS Please answer the following when applying: 1. Which framework would you use (Flutter, React Native, Capacitor) and why? 2. Have you integrated Apple Health or Google Fit before? 3. How would you wrap my Base44 application into a mobile-native experience? 4. What challenges do you expect with App Store review? 5. Can you deliver within the $2.5K–$5K budget? 6. What is your estimated timeline? ⸻ END OF JOB POST ⸻ Apply tot his job