I will build a cross-platform Flutter app with Firebase or Supabase backend

I will build a cross-platform Flutter app with a Firebase or Supabase backend, so you ship one clean codebase to iOS, Android, and web instead of paying to build the same product three times.

If you have a product idea, a Figma file, or a half-finished app that stalled, I turn it into a working, well-structured Flutter application with real authentication, a live database, and a release build you actually own.

What you get

• A Flutter app built from a single codebase that runs on iOS and Android (and optionally web/desktop), using current stable Flutter and Dart with null safety.
• A connected backend of your choice: Firebase (Auth, Firestore or Realtime Database, Cloud Storage, Cloud Functions) or Supabase (Postgres, Row Level Security, Auth, Storage, Edge Functions). I help you pick the right one for your data shape and budget.
• Working authentication: email/password plus at least one social or passwordless option (Google, Apple, magic link, or phone OTP) wired end to end, not just a login screen.
• Real data flows: create, read, update, and delete against your live database, with loading, empty, and error states handled rather than left blank.
• State management done properly with Riverpod, Bloc, or Provider (your preference or my recommendation), so the codebase stays maintainable as it grows.
• Responsive UI that adapts across phone sizes and orientations, matching your brand colors, fonts, and (if provided) your Figma/Adobe XD design.
• Navigation with go_router or Navigator 2.0, including deep links where relevant.
• A clean, documented GitHub repository you own, with a README covering setup, environment variables, and how to run and build the project.
• Release-ready builds: a signed Android .aab/.apk and an iOS archive, plus written guidance for submitting to the App Store and Google Play.
• A short handoff call or Loom walkthrough of the architecture so you or your team can keep building.

Plans

Feature	Basic	Standard	Premium
Screens included	Up to 4	Up to 10	Up to 20 (or as scoped)
Backend (Firebase or Supabase)	Yes	Yes	Yes
Authentication	Email/password	Email + 1 social/OTP	Multi-provider + roles
Database CRUD	Basic	Full CRUD + queries	Full + complex relations
Push notifications	—	Optional	Included
Cloud functions / serverless logic	—	1–2 functions	Multiple functions
In-app payments (Stripe/RevenueCat)	—	—	Optional
Platforms	iOS + Android	iOS + Android	iOS + Android + Web
Store submission guidance	Written notes	Written + checklist	Hands-on assistance
Source code + README	Yes	Yes	Yes
Revisions	1	2	3

Tiers are guidelines. Send me your feature list and I'll confirm exactly which plan fits before we start, or scope a custom build.

How it works

1. Discovery. You share your idea, designs, feature list, and any existing code or assets. We agree on the screen count, the backend, and the must-have features for this build.
2. Plan and architecture. I send a short written scope: screens, data models, auth method, backend choice, and a milestone breakdown so there are no surprises.
3. Backend setup. I provision Firebase or Supabase, define the database schema, configure security rules (Firestore rules or Supabase RLS), and set up auth providers.
4. Build. I develop the app screen by screen, wiring UI to live data. I share progress builds (APK or a web preview / TestFlight) so you can click through it as it comes together, not just at the end.
5. Review and revisions. You test against the agreed scope and send feedback. I apply the revisions included in your plan.
6. Handoff. I deliver the source repo, release builds, environment docs, and a walkthrough so the project is fully in your hands.

Why choose this

I write production-minded Flutter, not throwaway demos. That means a sensible folder structure, separated UI and business logic, environment-based config so your API keys aren't hard-coded, and security rules configured from the start rather than left wide open. I treat your backend as a real system: indexed queries, validated writes, and access rules that match who should see what. You get a codebase another developer can read, a backend you can afford to run, and builds that pass store review. I communicate in plain language, share progress you can actually test, and tell you honestly when a feature belongs in a later phase instead of quietly inflating scope.

Who it's for / use cases

• Founders and startups validating an MVP who need a real app in users' hands quickly.
• Small businesses wanting a branded mobile app for bookings, orders, loyalty, or content.
• Agencies and studios needing an experienced Flutter developer to deliver a client build.
• Existing app owners who want a rebuild, a new feature set, or a backend migration to Firebase or Supabase.
• Common builds: marketplaces, social and community apps, on-demand and booking apps, fitness and habit trackers, chat apps, internal business tools, and content or directory apps.

FAQ

Q: Should I choose Firebase or Supabase? Firebase suits real-time, document-style data and fast setup with Google's ecosystem. Supabase suits relational data, SQL, and teams who want Postgres and open-source tooling. Tell me your data and I'll recommend one, then build on it.

Q: Will the app work on both iOS and Android? Yes. Flutter compiles one codebase to both platforms, and I test on both. Web and desktop are available on the Premium plan or as an add-on.

Q: Do I own the source code? Completely. I deliver the full repository, your backend project, and all assets. Nothing is locked to me, and there are no hidden dependencies you can't access.

Q: Can you publish it to the App Store and Google Play for me? I provide signed release builds plus a submission checklist on every plan, and hands-on submission help on Premium. You'll need your own Apple Developer and Google Play accounts since the apps must be registered under your name.

Q: Can you work from my existing designs or code? Yes. Send Figma, XD, or an existing repo and I'll build to it. If you have no designs, I can implement a clean, standard UI based on your requirements.

Q: What do you need from me to start? A clear feature list, any designs or branding, and access to (or permission to create) the Firebase/Supabase project and app store accounts. The more detail up front, the faster we move.

Q: Can you add payments, push notifications, or maps later? Yes. Stripe or RevenueCat payments, push notifications, maps, analytics, and similar integrations can be included in your plan or added as the project grows.

Q: What happens if I find a bug after delivery? Bugs in the agreed, delivered scope are fixed at no extra charge during the revision window. For ongoing changes and new features after handoff, I'm available for continued work.