Flutter App Development Services

Flutter apps for one controlled interface across iOS and Android.

We build Flutter products when both mobile platforms need a shared workflow and a consistent custom-rendered interface. The first release proves the hardest plugin, native channel, performance, and platform-convention boundary before the codebase grows.

See our work

Bring the problem, the current workflow, or the existing code. We reply with a practical next step within one business day.

The brief

Start with what is not working.

Good software decisions begin with the constraint, not a list of features or a preferred technology.

01

Does the product need a controlled branded interface across both stores without maintaining two presentation layers?

02

Are critical plugins, native channels, background behavior, or web and desktop expectations still assumptions?

Plain answer

Flutter app development uses Dart and Flutter's rendering system to ship one product across iOS and Android with a controlled custom interface. RaftLabs proves critical plugins, native channels, performance, lifecycle, and platform conventions before scaling the shared codebase. A focused first release starts at $20,000 and usually takes 12 to 16 weeks.

One codebase still had two platform edges.

The interface matched. Then a payment plugin behaved differently after an OS update on a real device, while background work stopped on one platform during the same release. Flutter removes much duplicate product work, but every critical package, lifecycle behavior, native channel, and store-delivery path still needs separate proof.

Published Flutter proof

in production on iOS and Android
2+ years
Legal events app case study
recorded QR checkout flow
Under 15 sec
Medical-spa loyalty case study
from one Flutter codebase
iOS + Android
Medical-spa loyalty case study

The legal events app and medical-spa loyalty app document these Flutter results. They do not prove that Flutter fits every product or guarantees a delivery outcome. A new release needs its own plugin, performance, device, and store criteria.

Choose Flutter when controlled rendering and one shared mobile product outweigh automatic platform-native UI.

Start by proving the hardest plugin, native channel, lifecycle, or performance requirement.

A fit
01

The same core product and release cadence are required on iOS and Android.

02

A consistent custom interface matters more than inheriting each platform control automatically.

03

The team can own Dart, Flutter upgrades, packages, and any Swift or Kotlin channels.

Not a fit
01

The product is only for one platform or depends on the newest native interface immediately.

02

Critical hardware or background behavior cannot be proven through packages or channels.

03

Web SEO or desktop conventions are central and assumed to work without separate design.

Flutter vs React Native vs native

RouteBest fitConstraint to prove
FlutterShared product with controlled custom renderingPackages, channels, lifecycle, conventions, and Dart ownership
React NativeShared product aligned with React and TypeScriptNative modules, package health, and platform UI differences
NativePlatform-specific product or deep OS behaviorSeparate delivery and maintenance streams are justified

Scope

What belongs in a focused Flutter release

  • 01

    Shared product and widget system

    Implement the core workflow, design tokens, widgets, navigation, state, errors, analytics, and accessibility for both platforms.
  • 02

    Package and platform-channel proof

    Review critical dependencies and write or test Swift and Kotlin channels where the framework layer is not enough.
  • 03

    API and offline behavior

    Integrate authenticated services, secure storage, queued work, conflicts, retries, and recovery without hiding uncertain state.
  • 04

    Platform adaptations

    Handle permissions, back behavior, gestures, purchases, notifications, lifecycle, and other OS-specific expectations explicitly.
  • 05

    Both-store delivery

    Prepare buyer-owned signing, metadata, privacy answers, testing tracks, staged rollout, monitoring, and handover for each store.

How it works

From Flutter fit to both-store release

  1. Phase 1
    01

    Define product and rendering constraints

    Map workflows, interface system, devices, platform conventions, native capabilities, performance, team skills, and acceptance measures.

  2. Phase 2
    02

    Prove plugins and native boundaries

    Test the hardest package, platform channel, lifecycle, rendering, offline, background, or existing-backend constraint.

  3. Phase 3
    03

    Build the shared Flutter product

    Implement widgets, state, navigation, API and offline behavior, native adaptations, accessibility, telemetry, and tests.

  4. Phase 4
    04

    Release both stores and hand over

    Complete platform QA and submissions, stage rollout, monitor each build, document native channels, and establish ownership.

Risk

What the Flutter specification must settle

Critical packages
Review maintenance, licensing, OS support, release cadence, and replacement options before a dependency becomes architecture.
Native channels
Name Swift and Kotlin code, tests, upgrade ownership, and the team that can maintain each bridge.
Platform conventions
Decide where a consistent branded interface should yield to iOS or Android behavior and accessibility expectations.
Additional surfaces
Treat web and desktop input, layout, accessibility, SEO, and release channels as product work, not free output.

Scope and price

A focused Flutter release starts at $20,000.

Begin with one core workflow, iOS and Android builds, standard backend integration, monitoring, and store submission.

Framework selection follows a proof of the hardest package or native boundary.

Starting investment

Starts at $20,000

A focused first release usually takes 12 to 16 weeks. Native channels, offline complexity, custom rendering, or more surfaces extend the plan.

Plugin risk made visible

Critical packages, alternatives, platform support, and upgrade ownership are recorded before implementation is fixed.

Native work remains owned

Swift and Kotlin channels, store configuration, and platform-specific tests are included in handover.

Related mobile app services

Common questions

Flutter fits when the product values controlled custom rendering across platforms and the team is comfortable owning Dart and Flutter. React Native may fit better when existing React and TypeScript skills, native controls, or JavaScript ecosystem alignment matter more. Critical packages and interactions should be tested.

Choose native when the product is platform-specific, needs new OS capabilities immediately, relies heavily on platform-native interaction, or requires hardware and background behavior that cannot be supported cleanly. Flutter fits shared products whose native edges are bounded and maintainable.

Often yes through maintained packages or platform channels written in Swift and Kotlin. We prove the required capability on representative devices before committing. A package listing does not by itself prove lifecycle behavior, performance, maintenance, or compatibility with the supported OS range.

Flutter can target those surfaces, but shared code does not mean one interface fits every context. Input, navigation, accessibility, SEO, download size, integrations, and release channels differ. We scope web or desktop only when the product and ownership case justifies those adaptations.

A focused first release starts at $20,000 and usually takes 12 to 16 weeks. It covers one core workflow, iOS and Android builds, standard backend integration, monitoring, and store submission. Custom rendering, native channels, offline complexity, or additional web and desktop surfaces increase scope.

Work with us

Bring the Flutter assumption the product cannot afford to get wrong.

Share the workflow, interface, devices, plugins, native capabilities, existing team, backend, and target surfaces. We will prove the hardest boundary before scoping the shared build.

  • Scope and cost agreed before work starts. No surprises. No obligation.
  • Working prototype within 3 weeks of kickoff.
  • Pay by milestone. You see progress before each invoice.
  • 60-day post-launch warranty. Bug fixes, UI tweaks, and deployment support. No retainer.
  • All conversations are NDA-protected.