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Services · Mobile · Flutter

Mobile App Development (Flutter)

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01

The problem

  • Duplicated work: separate Android and iOS codebases double the cost and slow down every release.
  • Hard-to-maintain apps: state management grew without structure, and there are no tests.
  • Poor performance on real devices: janky scrolling, slow start-up, large app size.
  • Security gaps:
    • tokens stored in plain text
    • API keys in the app bundle
    • no certificate pinning
  • Store releases are painful, and crash reports go unread.

02

What we do

New app development

  • Product and UX: product and UX design that follows Material 3 and the iOS Human Interface Guidelines where each platform expects it.
  • Architecture: a clean architecture with feature modules, using BLoC or Riverpod for state, repository pattern for data, and dependency injection.
  • Offline-first and sync, where it suits the product.
  • Native integrations through platform channels: payments, maps, camera, biometrics, push notifications, background tasks and deep links.
  • Accessibility, localisation and right-to-left support.

Existing app improvement

  • Code and architecture review, with a refactoring plan. See Refactoring & Re-architecture.
  • Performance profiling: frame rendering, start-up time, memory use and app size.
  • Migrations: from separate native apps, or from React Native, to Flutter, done screen by screen where that makes sense.
  • Upgrades: Flutter and Dart version upgrades, and dependency clean-up.

Mobile security

  • Data on the device: secure storage (Keystore/Keychain) and code obfuscation.
  • Secrets: no secrets in the app bundle.
  • Network: certificate pinning.
  • Device integrity: Play Integrity / App Attest where needed.
  • Standard: testing aligned with OWASP MASVS. See Security Testing.

Testing and release

  • Automated tests: unit, widget, golden and integration tests in CI.
  • Device coverage: testing across a matrix of real devices.
  • Release automation: Codemagic or GitHub Actions with Fastlane, plus flavours for dev, staging and production.
  • Store releases: Play Store and App Store submissions, staged rollouts and review handling.
  • Monitoring: Crashlytics or Sentry, plus analytics.

03

How it works

  1. Scoping call. We cover your app, users, platforms and timeline.
  2. Discovery and design. Flows, prototype and technical plan.
  3. Sprint-based build. Test builds through TestFlight and Play internal testing every sprint.
  4. QA and security checks. On real devices.
  5. Store release. Staged rollout and monitoring.
  6. Support or handover.

04

What you receive

  • Designs and prototype.
  • Flutter source code with tests and documentation.
  • CI/CD pipelines and signing setup in your accounts.
  • Published apps in your store accounts.
  • Test, performance and security check reports.
  • Handover sessions.

05

Standards and tools

Aligned with: OWASP MASVS/MASTG, Material Design 3, the Apple Human Interface Guidelines, WCAG 2.2, and Google Play and App Store review guidelines.

Tools:

  • Framework and state: Flutter, Dart, BLoC/Riverpod
  • Firebase: Auth, Messaging, Crashlytics, Remote Config
  • Build and release: Codemagic, Fastlane, GitHub Actions
  • Performance: Flutter DevTools
  • Security testing: MobSF

06

Packages

We offer fixed-price packages for businesses with different needs. Scope, timeline and deliverables are agreed in writing after the scoping call.

07

Next step

Book a 30-minute call to talk through your product and what you need.

Book a call

FAQ

Questions

Is Flutter a good choice for our app?

For most business and consumer apps, yes. Flutter suits products that need consistent behaviour across Android and iOS from one team. If your app relies heavily on very platform-specific features, we'll tell you, and we can combine Flutter with native modules.

Will the app feel native?

Yes. We follow each platform's conventions where users expect them, such as navigation, gestures and system dialogs, and we test on real devices.

Can you take over an existing Flutter app?

Yes. We start with a code and architecture review, then stabilise, test and improve the app step by step.

Can you build the backend too?

Yes. See [Backend & Cloud Engineering](/services/backend-cloud-engineering).

Do you handle App Store and Play Store submission?

Yes, including store listings, privacy declarations and responding to review feedback. Publishing happens under your developer accounts.

Can Flutter also cover web or desktop?

It can. For public websites, we usually recommend a web framework such as Next.js and reserve Flutter web for app-like internal tools.

Start a project

Have a product to ship?

Engagements are fixed-price packages, shaped to the business. Book a call for a quote.

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