Flutter app development company for iOS and Android from one codebase

When Flutter is the right choice

Flutter draws its own interface rather than using platform widgets, which is why Flutter apps look identical on iOS and Android and why designers like it: the design system you approve is what ships. It compiles to native code and handles animation-heavy interfaces well. It is the default recommendation for consumer apps, brand-led products and anything where visual consistency matters.

For a fuller comparison, read our Flutter vs React Native guide on the blog.

What we deliver

• Product design: flows, screens and a design system built as Flutter widgets.
• Flutter engineering: clean architecture, Riverpod or Bloc state management, offline-first data where needed.
• Backend: REST or GraphQL APIs on Node.js or Python, or Firebase for MVPs.
• Native modules in Swift and Kotlin for camera, Bluetooth, payments, background tasks and platform-specific features.
• Push notifications, deep links, analytics, in-app purchases and subscriptions.
• CI with Codemagic or GitHub Actions, automated tests, and App Store and Google Play release management.

Cost and timeline

Hourly equivalents are $19 to $45 depending on seniority. Every Flutter squad is led by an engineer with five or more years in mobile and at least three in Flutter.

Our Flutter process

1. Discovery: audience, core journey, platform features needed, and a fixed estimate.
2. Design: a Flutter-ready design system so components map one to one to widgets.
3. Sprint one: project skeleton, CI, authentication and a first build on your device within 10 days.
4. Feature sprints: two-week cycles with TestFlight and Play internal-testing builds every sprint.
5. Device testing: real devices across current and older iOS and Android versions, plus BrowserStack.
6. Release: store listings, screenshots, review responses and a staged rollout.

Handling the hard parts

Cross-platform frameworks fail on the edges: Bluetooth peripherals, background location, in-app purchases, biometric auth and camera pipelines. Our senior Flutter engineers write the Swift and Kotlin modules these need rather than relying on unmaintained packages, and we test them on real hardware. We also keep dependencies few and current, because dependency rot is the main long-term cost of any mobile app.

Maintenance after launch

Apple and Google change requirements every year. A maintenance retainer of $1.5k to $8k a month covers OS updates, dependency upgrades, store compliance, monitoring and small improvements, with defined response times. Or keep the same engineers as a dedicated team and continue the roadmap.

A worked example: a fitness app in Flutter

A fitness start-up wants iOS and Android at launch with workout plans, video, progress tracking, push reminders and a subscription. In Flutter, one team of two engineers builds both platforms: the design system is implemented once as widgets, video playback and background audio use a native module each, and subscriptions run through the stores' billing APIs with a small backend for entitlements.

Architecture choices we make

• Feature-first folder structure so teams can work in parallel without conflicts.
• Riverpod or Bloc for state, chosen by team preference and app complexity.
• A single design system package shared by every screen.
• Offline-first data with a local database and background sync where the product needs it.
• Typed API clients generated from the backend's OpenAPI schema.
• Crash reporting, analytics and feature flags from the first build.

Testing Flutter apps

Unit tests for logic, widget tests for components, and integration tests for the core journeys run in CI on every pull request. Before each store release we test on a device matrix: current and two previous versions of iOS and Android, small and large screens, and low-end Android hardware where performance problems show first. Beta builds go to TestFlight and Play internal testing every sprint so your team is testing on their own phones throughout.

Store submission and compliance

App Store review rejects apps for reasons that have nothing to do with code: missing privacy labels, unclear subscription terms, sign-in requirements. We handle privacy manifests, data-safety forms, subscription disclosures, screenshots and review responses, and we plan a staged rollout so a problem in the first hours reaches a small share of users.

Flutter for enterprise and field apps

Beyond consumer apps, Flutter is a strong fit for field operations, logistics and healthcare apps that must run on mid-range Android devices, work offline and integrate with scanners, printers and Bluetooth devices. Our logistics and healthcare industry pages describe that work; the same Flutter team builds it.

Flutter vs native cost and speed

Hiring dedicated Flutter developers

If you already have a product team and need Flutter capacity, our engineers join as dedicated developers on a monthly basis: $3,000 to $4,000 for mid-level, $4,000 to $5,600 for senior and $5,600 to $7,200 for lead engineers, full time, in your tools and hours. A shortlist arrives within 48 hours and engineers start within 5 to 10 business days, with a two-week replacement guarantee.

Getting started

Send a brief or book a call. A discovery sprint of one to two weeks produces a prototype, an architecture outline and a fixed estimate, and its cost is credited against the build. The first build on your device arrives within 10 days of kickoff.

What to bring to the first call

A description of the app's purpose and users, any designs or competitor apps you admire, and whether you need both stores at launch. If you already have native apps, links to them and an idea of what frustrates you about maintaining two codebases. We reply within one business day with a feasibility view, a rough range and a proposed discovery sprint, and you interview the Flutter engineers before anything is signed.