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 Apply To this Job