UI Kit lineage
Open source1,000+ widgets · 23K monthly pub.dev downloads
flutter app development company · live Flutter app development company.
Flutter app development company.
Built on the world's most-downloaded open-source Flutter component library.
Flutter mobile app development, AI inside Flutter, and honest cross-platform engineering from a mobile app development company that publishes its own UI library. From the team behind the GetWidget Flutter UI Kit (4,811★ on GitHub · 23K monthly pub.dev downloads · 1,000+ widgets). Mobile app development services, flutter app development agency engagements, and hire-flutter-developer staffing with transparent pricing from a $3K audit.
Definition
What is Flutter app development?
Flutter app development is the practice of building native iOS and Android applications from a single Dart 3 codebase using the Flutter SDK 3.x, instead of writing two separate native codebases or wrapping a web view. Unlike React Native (which renders through native bridges to platform UIKit and View components), Flutter renders its own widget tree directly to a Skia canvas, giving consistent pixel-perfect output across iOS, Android, web, desktop, and embedded targets. Unlike Cordova or Ionic webview wrappers, Flutter apps run as compiled ARM binaries with native gesture and animation performance. Production stacks pair Flutter with native iOS Swift and Android Kotlin for platform-specific work, the open-source GetWidget Flutter UI Kit (4,811 GitHub stars, 1,000+ components) for accelerated UI delivery, and Firebase, Supabase, or a custom AWS backend for state and sync.
4,811★
GitHub stars on the GetWidget Flutter UI Kit
23K
monthly pub.dev downloads (and growing)
1,000+
Flutter widgets shipped in production
8+ years
shipping Flutter at scale since 2017
why this flutter app development company Three things no other Flutter shop
Three things no other Flutter shop
on this page can credibly claim.
The SERP for flutter app development company is full of agencies promising Flutter expertise. None of them publishes a Flutter library, prices their work on-page, or ships AI inside the mobile apps they build. We do all three. These are the three reasons buyers pick us once they read past page one.
We publish the Flutter UI kit
Most Flutter app development companies claim Flutter authority. We can prove it: the GetWidget Flutter UI Kit is on pub.dev with 23,000 developers downloading it every month and 4,811 stars on GitHub. The Flutter developers who'd build your app are the same engineers who maintain a library the wider Flutter community uses.
AI and Flutter in one engineering team
Voice copilots, RAG-backed chat UIs, vision pipelines, streaming AI widgets: we ship these inside Flutter apps, not as separate microservices stitched in by another vendor. Our four V2 sibling pillars (Claude · OpenAI · automation · integration) prove the AI side is real, not a service-page bullet.
Transparent engagement tiers
A $3K Flutter audit · $10–25K fixed-price pilot · from $5K/month for a continuous embedded squad. With an explicit walk-away clause: if the audit shows we can't move the metric, no phase 2. No "contact us for a quote" black box. The pricing is on the page for the same reason the OSS code is on GitHub.
flutter app development services Six flutter app development services
Six flutter app development services
we ship, every quarter.
From custom Flutter app development to cross-platform mobile app development to AI inside Flutter: these are the patterns we ship most often. Each one comes with a fixed-fee audit option, a defined kill-point, and a runbook the in-house team takes over when our engagement ends.
Custom Flutter app development
Full-cycle Flutter app development services for iOS, Android and Flutter web. Greenfield builds, MVPs, and production launches. Type-safe Dart, Riverpod or Bloc, Firebase / Supabase / your-own-backend integration, CI/CD via Codemagic or GitHub Actions, store submission and post-launch monitoring.
UI / UX built on a real component system
Most agencies wire up Material defaults; we wrote a UI kit because the defaults aren't enough. Design-system-led UI/UX with a component library extending our open-source widgets (buttons, lists, cards, carousels, charts, forms), tuned for accessibility and brand fit before code is written.
Cross-platform mobile app development
As a cross-platform app development company shipping Flutter at scale, we put one Dart codebase on iOS and Android plus a Flutter web build where it makes sense. Where a platform-channel bridge to native Swift / Kotlin earns its complexity, we add it; where it doesn't, we don't.
AI features inside your Flutter app
Realtime voice agents (OpenAI Realtime API) embedded in Flutter, RAG-backed chat UIs over your private docs, vision pipelines (camera-to-structured-JSON), and streaming AI widgets. The differentiator no Flutter shop on this SERP discusses. See the next section.
Flutter migration from native or RN
Migrating a legacy native iOS/Android app or a struggling React Native codebase to Flutter. Shipped-pattern process: route-by-route incremental migration behind a feature flag, side-by-side metrics, walk-away clause if the data doesn't move. No big-bang rewrites.
Flutter maintenance + scale
Embedded squad picks up an existing Flutter app: Dart / Flutter version upgrades, dependency hygiene, crash and ANR triage, store-policy compliance, performance budgets enforced via integration tests. Most teams take this on after our pilot ships.
Different Flutter scope or stack?
We've shipped Flutter for food delivery, fintech, field service, enterprise internal tools, and consumer health. Tell us what's on your roadmap. The Flutter audit will tell you which slice is worth shipping first.
Tell us your Flutter scope ai inside your flutter app Real AI inside Flutter,
Real AI inside Flutter,
not a separate microservice.
Zero of the Flutter app development companies on this SERP discuss AI features inside the mobile app. We ship them. Pick a pattern on the left (voice agent, RAG chat, vision, or streaming widget) and see the Flutter integration shape. The code you're looking at is the code we'd ship in week one of your pilot.
Auth Ephemeral key issued from your backend
Pattern WebRTC · bidirectional audio · sub-second latency
Typical time-to-live Pilot in 4–6 weeks
import 'package:flutter/material.dart';
import 'package:getwidget/getwidget.dart';
import 'package:gw_ai/realtime.dart';
class VoiceCopilot extends StatefulWidget {
@override
State<VoiceCopilot> createState() => _VoiceCopilotState();
}
class _VoiceCopilotState extends State<VoiceCopilot> {
late final RealtimeSession session;
@override
void initState() {
super.initState();
session = RealtimeSession(
model: 'gpt-realtime-2',
tokenEndpoint: '/api/realtime/token', // ephemeral, server-issued
tools: [searchOrders, openTicket],
);
session.connect();
}
@override
Widget build(BuildContext context) {
return GFCard(
content: StreamBuilder<RealtimeEvent>(
stream: session.events,
builder: (_, snap) => VoiceVisualizer(state: snap.data),
),
);
}
}
Real integration snippet — the names changed. Realtime voice agent · lives in your repo.
our flutter process Flutter consulting → production
Flutter consulting → production
in 4 honest phases.
No big-bang Flutter rebuild promises and no scope-as-we-go hand-waving. Four phases, milestone-billed, with a walk-away kill-point after the prototype if Flutter isn't the right call. Most teams ship to TestFlight + Play Internal between weeks 6 and 10.
- Week 1–2
Discovery + Flutter audit
Fixed-fee $3K audit. We map your existing app (or greenfield brief), evaluate cross-platform fit honestly (Flutter vs React Native vs native), score each candidate feature on effort × ROI, and surface the real risks: store policies, platform-channel needs, AI cost projections. You leave with a 90-day Flutter roadmap and the math behind it.
Flutter roadmap · effort × ROI ranking · risk register - Week 2–3
Prototype + UI-kit decisions
We prototype the highest-uncertainty screen first, usually the one combining UI density, a platform-channel bridge, or an AI feature. Design-system decisions land here: which GetWidget components extend cleanly, which need custom work. You see the real interaction on a real device, not a Figma deck.
Working prototype · design tokens · component decisionsWalk-away point - Week 4–10
Build → ship to TestFlight + Play
Fixed-price pilot: one production-ready Flutter app or feature stream shipped behind a feature flag. CI/CD via Codemagic or GitHub Actions, automated integration tests, crash reporting (Sentry / Firebase Crashlytics), and analytics wired before launch. Weekly demos against the acceptance criteria from the audit.
Live in TestFlight + Play Internal Track · runbook - Ongoing
Maintain + scale
Embedded squad takes the app forward: Dart / Flutter version bumps on schedule, dependency hygiene, store-policy compliance, performance budgets enforced in CI, monthly cost-of-ownership report. Cancel any month. Most teams move here after the pilot ships.
Monthly velocity + reliability report
flutter vs react native vs native When Flutter wins
When Flutter wins
and when it doesn't.
Cross platform mobile app development isn't a single answer, and react native vs flutter isn't a doctrine. The honest comparison across seven dimensions, pulled from shipped Flutter, React Native, and native client work rather than benchmarks. We're a cross platform app development company that ships all three stacks — you're here on the Flutter row; we'll tell you the cases where React Native or native is the right pick.
Dimension
You're here
Flutter Dart · single rendering engine
React Native JavaScript · native components
Native iOS+Android Swift + Kotlin · two codebases
Pixel-identical UI across platforms Same look on iOS, Android, and web without platform drift.
Flutter Single Skia/Impeller renderer · same pixels everywhere
React Native Bridges to native widgets · platform variance is real
Native iOS+Android Two design implementations · drift is inevitable
Cross-platform mobile + web from one codebase Flutter web is real; not for everything, but real.
Flutter iOS + Android + web from one Dart codebase
React Native Web via React Native Web, fine for some apps
Native iOS+Android Three codebases minimum
Hiring pool depth How many engineers can you actually hire.
Flutter Strong and growing, narrower than RN today
React Native JavaScript pool is largest in the world
Native iOS+Android Massive Swift + Kotlin community
Heavy native integration (Bluetooth, ARKit, etc.) When you need deep OS APIs.
Flutter Platform channels work, adds complexity
React Native TurboModules / Fabric work, also adds complexity
Native iOS+Android First-class access · least friction
Startup app size / cold-start time Bytes shipped and milliseconds to first frame.
Flutter Larger initial binary · fast steady-state
React Native Smaller binary · JS bridge startup cost
Native iOS+Android Smallest binary · fastest cold start
AI / streaming widgets Modern AI UX (streaming tokens, voice waveforms, live captions).
Flutter Stream + AnimatedSwitcher renders 60fps natively
React Native Workable · re-renders can throttle the JS bridge
Native iOS+Android Direct CALayer / Compose access
One team can ship the whole app Engineering org headcount math.
Flutter One Dart team ships iOS + Android + web
React Native One JS team ships iOS + Android
Native iOS+Android Need separate iOS + Android benches
When NOT to pick Flutter: when 70%+ of the app is deep-OS-API work (ARKit, custom BLE GATT, Apple Watch / Wear OS primary), when your hiring pool is JS-heavy and you can't realistically staff Dart, or when you need the smallest possible install size. We say so on every audit call.
Not sure if Flutter is the right call?
A 30-minute fit call — we'll tell you honestly whether Flutter, React Native, or native is the right pick for your roadmap. No pitch.
the flutter stack we use The Flutter, Dart and tooling we ship,
The Flutter, Dart and tooling we ship,
every project.
Vendor-agnostic on backend and AI model, opinionated on the Flutter stack itself. The list below is the most common. We deviate when your codebase or platform constraints demand it.
Flutter Dart Riverpod Bloc GoRouter Freezed GetWidget UI Kit Flutter Dart Riverpod Bloc GoRouter Freezed GetWidget UI Kit
Firebase Supabase Hive Drift / SQLite Realm GraphQL REST + Dio Firebase Supabase Hive Drift / SQLite Realm GraphQL REST + Dio
Codemagic GitHub Actions Fastlane Sentry Firebase Crashlytics App Store Connect Play Console Codemagic GitHub Actions Fastlane Sentry Firebase Crashlytics App Store Connect Play Console
Open source · since 2017
The Flutter UI Kit your team
The Flutter UI Kit your team
may already be using.
GetWidget is the open-source Flutter UI library our team has built and maintained since 2017: 1,000+ widgets shipped on the world's most-downloaded open-source Flutter component library, downloaded by 23,000 developers every month. Most Flutter app development companies on this SERP claim authority. We can show ours: 4,811 stars on GitHub, eight years of in-production patterns, and a public commit history. When you hire us, you hire the team that wrote the library.
Lists & CardsAvatarsButtonsForms & InputsCarouselsTabs & NavigationChartsToasts & Alerts
4,811 GitHub stars
23K monthly pub.dev downloads
1,000+ Flutter widgets shipped
8+ years in production at scale
capability patterns Flutter apps we've shipped.
Flutter apps we've shipped.
Anonymized, with the math.
Four anonymized capability patterns from real engagements: two AI-inside-Flutter, one cross-platform migration, one enterprise rebuild on the GetWidget foundation. Named references shared under NDA once we know what you're building.
Realtime voice copilot inside a Flutter ordering app
Problem
Top-of-funnel customers were dropping off the search-and-filter flow on a Flutter food-delivery app. Typed search was good; voice search was missing on Android and broken on iOS.
Approach
Embedded a Flutter voice agent backed by OpenAI Realtime API (gpt-realtime-2). Bidirectional audio over WebRTC, sub-second first-token latency, function-calling into the existing order-search API. Built using GetWidget Card + custom voice-state visualizer widget; auth via short-lived backend-issued ephemeral keys.
FlutterOpenAI Realtime APIWebRTCGetWidget UI Kit
Outcome
Read the full case study
+18% search-flow completion
RAG-backed chat in a Flutter field-ops app
Problem
Field technicians using a Flutter inspection app had to flip out to a separate web portal to read SOPs and equipment manuals. This ate ~20 minutes per visit and led to inconsistent diagnoses.
Approach
RAG agent over the existing SOP corpus (pgvector + Claude Sonnet 4.6) exposed as a streaming chat panel inside the Flutter app. Citations rendered as GetWidget GFListTile rows the tech can tap to open the source PDF. Offline-tolerant: queues questions until reconnect.
FlutterClaude Sonnet 4.6pgvectorGetWidget UI Kit
Outcome
−16 min per field visit
Native iOS + Android to Flutter migration
Problem
Mid-size fintech maintaining two divergent native codebases (Swift on iOS, Kotlin on Android) that had drifted on feature parity. Roadmap was 40% feature work, 60% reconciliation work.
Approach
Incremental route-by-route migration to Flutter behind a feature flag. Old native screens stayed live while Flutter screens shipped one at a time; a thin platform-channel bridge kept legacy auth + biometric flows untouched. Walk-away clause at week 6 if performance regressed on the in-app trading screen.
FlutterRiverpodplatform channelsCodemagic
Outcome
−45% reconciliation engineering
Enterprise Flutter rebuild on the UI-kit foundation
Problem
Enterprise client had a Flutter app built by a previous vendor: inconsistent components, no design tokens, 12-second cold-start, 2.4% crash rate. The team wanted a rebuild without a 12-month freeze on feature work.
Approach
We rebuilt the foundation on extended GetWidget components + a tokenized design system, replaced Bloc-spaghetti with Riverpod, set a CI performance budget (cold-start under 2.5s, crash-free sessions over 99.6%). Shipped feature work continued throughout in a parallel branch.
FlutterRiverpodGetWidget UI KitFirebase Performance
Outcome
−68% crash-free regression
engagement models Three ways to start.
Three ways to start.
Audit, pilot, or continuous.
Same pricing as our other engagements: $3K audit, $10–25K pilot, from $5K/mo continuous. Most teams begin with a one-to-two-week Flutter audit to scope, then run a 5–8 week pilot on the highest-ROI workstream, then move to monthly for the next milestones.
1–2 weeks
Flutter audit
Find whether Flutter is the right call, and which features pay back fastest.
$3K fixed
- Cross-platform fit review (Flutter vs React Native vs native, honestly)
- Existing app health check (if any): perf, crash, store policy, dep hygiene
- Per-feature effort × ROI ranking
- AI-inside-Flutter opportunity scoring (voice / RAG / vision / streaming)
- 90-day Flutter roadmap + walk-away clause
5–8 weeks
Flutter pilot
One Flutter MVP or feature stream shipped end-to-end. Not a prototype.
$10–25K fixed price
- Discovery + scoping on your highest-ROI Flutter workstream
- Build on iOS + Android (and Flutter web if it fits), behind a feature flag
- GetWidget component-system foundation + Riverpod / Bloc state
- CI/CD (Codemagic or GitHub Actions) · crash reporting · analytics
- Walk-away point: if the metric won't move, no phase 2
Monthly
Continuous Flutter team
Hire mobile app developers as an embedded squad shipping the next Flutter milestone on your roadmap.
from $5K per month
- PM + Flutter engineer(s) + AI engineer when needed, embedded
- Dart / Flutter version upgrades + dependency hygiene on cadence
- Performance budget enforced in CI · monthly cost-of-ownership report
- Cancel any month. No annual lock-in.
Your repo, your store accounts iOS · Android · Flutter web GetWidget UI Kit foundation Bengaluru-based · remote-first
frequently asked Questions Flutter buyers ask most.
Questions Flutter buyers ask most.
Real answers, no hedging.
How much does Flutter app development cost in 2026?
Three engagement tiers, on the page, not buried. A one-to-two-week Flutter audit is $3,000 fixed: cross-platform fit review, existing-app health check, per-feature effort × ROI ranking, and a 90-day roadmap. A Flutter pilot (one MVP or feature stream shipped end-to-end) is $10,000–$25,000 fixed price over 5–8 weeks. A continuous Flutter team is from $5,000 per month (embedded squad shipping the next milestone, cancel any month). The main cost drivers we surface in the audit: number of native platform-channel bridges (Bluetooth, ARKit, biometrics), whether AI features are in scope, and whether a separate Flutter-web build is needed. Most teams underestimate platform-channel work and overestimate the cost of AI features.
How long does it take to build a Flutter app from scratch?
Realistic distribution from shipped client work: a simple Flutter MVP (one user persona, no native integrations, no AI features) ships to TestFlight + Play Internal in 5–7 weeks. A production-ready launch (App Store + Play Store, analytics, crash reporting, basic backend) typically lands in 10–14 weeks. A more complex Flutter app development project (multi-persona, native integrations, AI inside the app, separate Flutter-web build) runs 14–20 weeks. We don't quote a 30-day timeline for work that takes 90 days; the audit phase tells us which bucket you're in before any contract.
Flutter vs React Native — which should we use?
Honest answer: not always Flutter. Pick Flutter when you need pixel-identical UI across iOS + Android (single Skia/Impeller renderer), a Flutter web build from the same codebase, or modern AI streaming UX where 60fps text and waveform rendering matter. Pick React Native when your hiring pool is JavaScript-heavy and you can't realistically staff Dart, or when most of the app is thin wrappers over native iOS/Android components. Pick native (Swift + Kotlin) when the app is genuinely 70%+ deep-OS-API work: ARKit, CoreML on-device, Bluetooth Low Energy with custom GATT profiles. We've shipped Flutter, advised against Flutter, and migrated apps both into and out of Flutter. The comparison table above is the same matrix we use in audit calls.
Should we hire Flutter developers in-house or work with a Flutter app development agency?
Hire Flutter developers in-house when you have a multi-year Flutter roadmap (12+ months of continuous app work) and an engineering manager who can interview Dart skill credibly. Go with a Flutter app development agency when you need a senior Flutter team for a specific phase (MVP, major rebuild, migration, or an AI-features push) without the 6–9 month hiring ramp. We're an agency that often hands off to in-house teams: we'll build, document and run the GetWidget-component-system foundation so an in-house Flutter team can take it forward. The sibling page hire Flutter developers goes deeper on the in-house-vs-agency tradeoff.
Can you add AI features to our existing Flutter app?
Yes. It's typically less painful than retrofitting AI into a native iOS/Android stack because Flutter's reactive widget model and Stream-based plumbing are a natural fit for streaming AI UX. Four patterns we ship most often inside existing Flutter apps: (1) Realtime voice agents on the OpenAI Realtime API (gpt-realtime-2), embedded as a Flutter widget with WebRTC underneath; (2) RAG-backed chat over your private docs with streaming tokens and inline citations; (3) Vision pipelines that turn the device camera into a structured-JSON feed (receipts, IDs, equipment, ML on-device fallback); (4) Streaming AI widgets: token-by-token text, animated transitions, live captions. The audit ranks which pattern fits your app and projects token-cost. See also: OpenAI development, AI integration services.
Is Flutter ready for enterprise apps?
Flutter has been production-ready for enterprise apps for several years. Google Pay, BMW, eBay Motors, Toyota's vehicle UI, and Alibaba have all shipped large-scale Flutter apps in production. The honest enterprise risks aren't technical, they're organizational: (a) Dart talent depth in your hiring market vs JavaScript/Kotlin; (b) Flutter web maturity for desktop-class internal tools (good for many use cases, not all); (c) deep platform-specific integrations that need platform-channel bridges and a small native team alongside. Our enterprise Flutter development work is usually rebuilds on a tokenized design system + GetWidget component foundation, with explicit performance budgets enforced in CI (cold-start, crash-free sessions, frame budget). The case study above on the enterprise Flutter rebuild is representative.
Can you integrate Flutter into our existing native iOS or Android app?
Yes. Flutter ships an
add-to-app mode that embeds a Flutter module inside an existing UIKit / SwiftUI / Android Compose app, sharing data via platform channels. We've shipped this both directions: adding Flutter screens to native apps (incremental migration), and adding native screens to Flutter apps (when deep-OS-API work is genuinely native-only). The honest callout: add-to-app increases build complexity, binary size, and CI time, and you maintain two language toolchains. We recommend it when a single workflow inside your native app needs Flutter's UI velocity or a streaming AI widget; we recommend against it when the goal is just to "try Flutter" in a corner of the app.What is the GetWidget Flutter UI Kit and why does it matter?
GetWidget is the open-source Flutter UI library our team built and maintains: 1,000+ widgets across forms, lists, cards, avatars, carousels, charts, toasts, navigation and more. It's on GitHub with 4,811 stars and on pub.dev with 23,000 monthly downloads. A Flutter UI kit / Flutter UI library / Flutter widgets library actively used by tens of thousands of developers. It matters for our agency work for one reason: the engineers who'd build your Flutter app are the same team that has shipped, debugged, and supported 1,000+ Flutter components in production for eight years. That's a hiring signal no competing Flutter app development company on this SERP can match. Star us on GitHub.
What does GetWidget specifically NOT do for Flutter projects?
Honest list, because the engagement works better when scope is clear: (1) Sub-$10K builds: the audit + onboarding overhead doesn't fit; freelance Flutter developers are a better fit at that price point. (2) Pure design-system work without development: we don't ship Figma libraries as a deliverable; we ship components and the design system that goes with them. (3) Native-only specialty apps where genuinely 70%+ of work is deep-OS-API (heavy ARKit, custom Bluetooth GATT, Apple Watch / Wear OS as primary surface) — we'll say so in the audit and recommend you go native. (4) Crypto / unregulated trading / get-rich-quick fronts: we just don't take this work. The walk-away clause in our audit and pilot exists for the same reason: if the data shows we can't move the metric, no phase 2.
Ready to ship Hire a flutter app development company
Hire a flutter app development company
that built the library it ships.
Book a Flutter app development audit. We'll review your existing Flutter app (or greenfield brief), give you an honest Flutter-vs-React-Native-vs-native call, rank each feature on effort × ROI, score where AI inside Flutter pays back, and ship a 90-day Flutter roadmap. Fixed-fee $3K. No deck, no obligation to build.
1–2 weeks · async or live Walk-away clause built-in AI-in-Flutter scoring included
keep exploring Related pages.
Related pages.
Pick where you are.
Flutter often connects to the AI engineering siblings, the hire-side intent, or the open-source library that started this whole shop. These pages go deeper.
Hire Flutter Developers
Sister pillar: hire-side intent. When in-house Flutter wins, when an agency wins, and how staff augmentation fits in.
Open Source: GetWidget UI Kit
The Flutter UI library that powers our agency work. 4,811★ on GitHub, 23K monthly pub.dev downloads, 1,000+ widgets.
AI Development Company
The umbrella AI pillar: operator-grade AI dev across Claude, GPT, and open-weights. Pair with Flutter for AI-in-mobile.
OpenAI Development
Hire OpenAI developers for the Realtime API voice agents and GPT-5.4 vision pipelines we embed inside Flutter apps.
AI Integration Services
Plug GPT, Claude, or your model of choice into Salesforce, NetSuite, Zendesk and 50+ platforms, including from inside Flutter.
AI Chatbot Development
Production chatbots (voice, WhatsApp, web) built on Sonnet 4.6 + GPT-5.4-mini. Embed them as a Flutter screen or a standalone surface.
Top Flutter app development companies
The shortlisting framework we wish we'd had as a buyer: how to evaluate a Flutter app development company beyond Clutch stars and case-study screenshots.
7 reasons to choose Flutter for startups
The Flutter-vs-native decision honestly framed for early-stage teams: shipping speed, hiring market, AI-feature fit, and the rebuild risk we've actually seen on client projects.
What does it cost to hire a Flutter developer?
Rate ranges by geography + seniority + engagement shape (in-house · staff aug · agency · freelance), with the math behind the $3K audit and the $10–25K pilot.