Start

Home / Services / Flutter App Development

Flutter App Development for Startups

One codebase for iOS, Android, and web. Paired with a Rails or Supabase backend that's built to scale. We're a two-person studio in Chicago and Dallas shipping production Flutter apps for founders who want real software, not a prototype that falls over at launch.

Start a Project

Who This Is For

Founders who need a mobile app in front of real users, not six months from now. Teams that got a prototype out of Cursor or Bolt and hit the wall when it came time to add auth, payments, real data, and a second platform. Companies that want one team building iOS, Android, and web instead of three.

We work best with founders who want direct access to the people writing the code. No account managers, no offshore handoffs, no surprise invoices.

Why Flutter?

Flutter is Google's cross-platform UI framework. One Dart codebase compiles to native iOS, native Android, and the web. For a startup, that changes the math on what a mobile product costs to build and maintain.

  • One codebase, three platforms. Ship iOS and Android together. Add web later without rewriting.
  • Faster iteration. Hot reload during development. A feature built once, not three times.
  • Native performance. Flutter compiles to native ARM code. It's not a webview wrapper.
  • Mature ecosystem. Google, BMW, Alibaba, and Nubank run Flutter in production. The tooling is there.
  • Lower ongoing cost. One team maintaining one codebase beats three teams maintaining three.

How We Build with Flutter

Our standard stack is Flutter on the client, Rails or Supabase on the backend, and Vercel or Fly for hosting. That combination has shipped apps for healthcare, background screening, consumer AI, and B2B tools.

Feasibility First

Before any UI work, we pressure-test the hardest technical questions. Data model, third-party integrations, offline behavior, auth flows.

Flutter + Rails

Flutter on the device, Rails API on the server. Our default when the domain logic is complex or you need background jobs, admin tools, and custom workflows.

Flutter + Supabase

Postgres, auth, realtime, and file storage without standing up a separate API. Fast path to a working product when the backend is mostly CRUD with auth.

Design System in Flutter

Custom theming and component libraries built in Flutter from day one. Not Material defaults dressed up to look like a brand.

CI/CD and Store Releases

Codemagic or GitHub Actions for automated builds. We handle App Store and Play Store submissions, TestFlight, and internal testing tracks.

You Own the Code

Your repo, your Apple and Google developer accounts, your backend. We're not a platform you have to stay on.

Flutter Projects We've Shipped

A sample of Flutter apps we've built or are actively building. Every one of these is a real product with real users.

  • Perfume Lens — AI-powered fragrance discovery. Flutter client with a vision-model backend. Users photograph a bottle and get notes, similar scents, and buying options.
  • CoGo — AI-powered relationship guidance. Cross-platform Flutter app with a conversational interface backed by custom LLM orchestration.
  • ScoutLogic — Background screening and compliance. The mobile surface of a larger Rails platform, built in Flutter for field users.
  • MealWatchers — Nutrition tracking with a community layer. Flutter app paired with a Supabase backend.
  • MyCheckUpHealth — Transparent-cost healthcare booking. Flutter client for patients, Rails backend for providers and admin.
  • SitterChat — Chat-based coordination platform. Flutter with realtime messaging on Supabase.

Flutter + AI

Most of our recent Flutter work has an AI layer. Vision models for Perfume Lens, conversational LLMs for CoGo, embeddings and retrieval for internal tools. Flutter is a clean fit for AI products because the UI layer can focus on streaming responses, progressive disclosure, and state management while the model work stays server-side.

We handle integrations with:

  • OpenAI (GPT-4/5, Whisper, vision, embeddings)
  • Anthropic (Claude for reasoning-heavy workflows)
  • Google Gemini (multimodal and long-context use cases)
  • Custom RAG pipelines with Supabase pgvector or Pinecone
  • On-device ML via TensorFlow Lite when latency or privacy matters

API keys never live on the device. All model calls route through a backend we control, which means you can swap providers, add rate limiting, and track cost per user without shipping a new app build.

Frequently Asked Questions

Why build a mobile app with Flutter instead of native iOS and Android?

Flutter ships one codebase to iOS, Android, and web. For a startup, that usually means half the build time, one team instead of three, and feature parity across platforms on day one. Native makes sense when you need deep platform-specific features or extreme performance; Flutter fits most startup product roadmaps.

How much does a Flutter app cost to build?

A production Flutter MVP typically runs $60,000 to $150,000 depending on scope, backend complexity, and integrations. We work on flexible monthly retainers rather than fixed bids, so you can pause or scale the plan as the product evolves. No time-and-materials billing.

How long does it take to build a Flutter MVP?

A focused MVP generally ships in 10 to 16 weeks. That assumes a clear product definition, a single-team backend, and no surprise compliance requirements. We run a Feasibility First phase before that to pressure-test the hardest technical questions so the build is grounded in reality.

What backend do you pair with Flutter?

We typically pair Flutter with a Rails API, Supabase, or both. Rails when the domain logic is complex and we need a mature backend. Supabase when we need auth, realtime, and Postgres without standing up a separate API layer. Most of our production apps use some combination of the two.

Can Flutter apps integrate with AI models and LLMs?

Yes. We build AI features on the backend (Rails or Supabase Edge Functions) and call them from Flutter. That keeps API keys off the device and lets you swap models without shipping a new app version. Our apps use OpenAI, Anthropic, Gemini, and custom embeddings depending on the use case.

Do you hand off the code or keep it locked to your agency?

You own the code. Full stop. Repo, infrastructure, credentials, everything. No vendor lock-in, no proprietary platform, no licensing games. If you want to take the project in-house or to another team, we help make the handoff clean.

Do you work with non-technical founders?

That's most of our work. Co-founder Don Bora operates as a fractional CTO for many of our Flutter clients, translating product ideas into technical plans and keeping engineering accountable. Non-technical founders get hands-on engineering plus the strategic layer in one engagement.

Ready to Build?

Tell us what you're building. We'll talk through fit, timeline, and what the first 90 days could look like. No pressure, no sales pitch.

Get Started