Flutter · Dart · iOS + Android
Flutter App Development Company Building iOS and Android From One Dart Codebase
Cross-platform Flutter apps engineered in Ahmedabad and shipped to clients across India, USA, UK, UAE, Australia, and Canada. One Dart codebase covers both stores, one team owns delivery from wireframe to review approval, and every scope is priced up-front in INR or USD.
- ✓One Dart codebase ships to App Store and Google Play with 90% code reuse
- ✓Flutter 3.x with Impeller rendering, Material 3, and Cupertino widgets on both platforms
- ✓Riverpod, Bloc, or GetX state management — chosen for your team, not ours
- ✓MVP delivery in 6-10 weeks, production release in 12-16 weeks, fixed-scope pricing
- ✓Firebase, Stripe, Razorpay, RevenueCat, and offline-first sync wired in from day one
Why Flutter is the cross-platform default we recommend in 2026
Flutter went stable in 2018 and by the end of 2024 had crossed one million published apps across the App Store and Google Play. That growth is not marketing — it is the shape of a toolkit that keeps solving the specific problem product teams have when they need to ship on both platforms without doubling the team, doubling the timeline, or accepting the web-view compromise a hybrid framework forces.
The technical case rests on three properties. Flutter compiles Dart to native ARM code, so the app runs at native frame rates rather than through a JavaScript bridge. Every pixel on the screen is drawn by the Flutter engine (now Impeller on iOS, Vulkan on Android), which means the UI looks identical on both platforms and animations stay at 60 fps — or 120 fps on devices that support it. And the widget library ships both Material 3 and Cupertino out of the box, so the same app can wear its Android skin on Android and its iOS skin on iOS without a second codebase.
The business case is simpler. One codebase, one team, one testing pass. A Flutter MVP that we would quote at ₹4-8 lakh in India lands closer to ₹8-15 lakh as two separate native builds for the same scope. For a founder or product owner making the platform decision on day one, that difference either extends the runway by three months or funds a second sprint of features.
When to choose Flutter over React Native, native Swift and Kotlin, or a PWA
The best framework for a project depends on the project, not the developer. We have shipped native iOS apps in Swift, native Android apps in Kotlin, React Native apps, PWAs, and Flutter apps in the last three years. The framework arrives from the requirement — hardware access, team skills, distribution plan, and total cost of ownership — not from a preference.
Pick Flutter when the product is a consumer or B2B app that has to look and feel native on both platforms, needs custom animations, and does not touch the deepest layers of the OS. Food delivery, e-commerce, edtech, healthtech, marketplace, on-demand services, field-service dispatch, sales-rep order booking, and internal ops apps are all in this sweet spot. The 90% code-reuse figure holds up in real projects, and the hiring pool for Flutter has caught up with the pool for React Native.
Pick React Native when your team already runs a React web stack and will maintain the app in-house after launch — the shared JavaScript and TypeScript skill pool is worth more than Flutter's raw performance edge in that context. Pick native Swift on iOS and native Kotlin on Android when the product needs hardware-heavy features (advanced camera, ARKit, complex Bluetooth, background audio processing) or latency-sensitive gaming, or when the app has to slot into an MDM-managed enterprise fleet with deep OS hooks. Pick a PWA only when the product is content-heavy, low-frequency, and the friction of the store review cycle costs more than the reach a real app would deliver.
For most new mobile projects we scope in 2026, Flutter is the honest answer — and when it is not, we say so on the discovery call.
- ›Choose Flutter for consumer and B2B apps that need to feel native on both stores
- ›Choose Flutter when the design team wants pixel-perfect custom UI, not stock widgets
- ›Choose React Native when your team already lives in the React ecosystem
- ›Choose native Swift or Kotlin for hardware-heavy, AR, or MDM-managed enterprise builds
- ›Choose a PWA only for content-first products where store friction outweighs native reach
- ›Choose Flutter when the budget has to cover both platforms without doubling
What a Flutter app build from Fruxinfo actually delivers
Every Flutter app we deliver ships with the core modules a modern mobile product needs, plus whatever custom features your roadmap calls for. You pay a one-time fixed-scope build fee plus a predictable support retainer — no per-user or per-feature module charges hidden inside the invoice.
- ›iOS and Android builds from a single Flutter codebase with 90% code reuse
- ›User onboarding with email, phone OTP, Google, Apple, and social sign-in
- ›Payment integration — Stripe, Razorpay, PayU, Apple in-app purchases, Google Play Billing
- ›RevenueCat integration for unified subscription state across both stores
- ›Push notifications, deep links, and share sheets wired through Firebase Cloud Messaging and APNs
- ›Offline-first data capture with SQLite, Isar, or Hive plus server-side conflict resolution
- ›Admin dashboard on the web in Next.js or Laravel so you can manage users, content, and orders
- ›Analytics and crash reporting through Firebase, Mixpanel, Amplitude, or Sentry
- ›App Store Connect and Google Play Console submission handled end-to-end under your accounts
How we build your Flutter app — the seven-step process
We use the same discipline for every Flutter build, regardless of size. Each phase has a signed-off deliverable, and no phase starts until the previous one is closed. Weekly demos on a real device replace the big-bang surprise most app projects deliver at the end.
- ›Discovery — founder or product-team call, user-journey map, integration shortlist
- ›Blueprint — wireframes, screen inventory, fixed-price scope document, milestone timeline
- ›UI design — Figma mockups reviewed screen by screen before any Dart is written
- ›Development in sprints — weekly Flutter builds installed on a real iPhone and Android device
- ›Integrations and QA — payments, push, analytics, offline mode, and multi-device testing
- ›Store submission — App Store Connect and Play Console listings, screenshots, reviewer handling
- ›Launch and 90-day support — go-live monitoring, OS-update patches, and a support retainer
The Flutter stack we ship — packages, state, backend, and CI
Our default Flutter stack is Flutter 3.x on the front end with Riverpod for state management, Dio for networking, Freezed and json_serializable for typed models, and Isar or Drift for on-device storage. When a client's existing team already runs Bloc or GetX, we adapt — the state library is chosen for the team that will maintain the app, not for our preference.
On the backend, most Flutter apps we ship talk to a Laravel or Node.js API with MySQL or PostgreSQL storage, hosted on AWS, Google Cloud, or DigitalOcean under the client's account. Firebase is our default for authentication, cloud messaging, remote config, and analytics — with Crashlytics wired in from the first sprint so we see real crashes on real devices before store reviewers do. For subscription apps we route through RevenueCat to unify Apple and Google purchase state in one dashboard, and for real-time features we use Firestore or Supabase depending on the query pattern.
CI and release automation run through Codemagic or Fastlane, so once the initial store setup is done, future releases go from a merged pull request to a TestFlight build or Play Internal Track in under fifteen minutes. Every codebase ships with a golden-tests suite for critical widgets, unit tests for business logic, and integration tests for the full flow on both platforms — the pipeline blocks merges that break the test matrix.
The stack is chosen for total cost of ownership. Every dependency is stable, has an active maintainer, and has a viable replacement path if it is ever archived. If we ever fall out of favour with your team, you can hire another Flutter developer, hand them the codebase, and keep going.
- ›Flutter 3.x with Impeller rendering and Material 3 + Cupertino widgets
- ›Riverpod, Bloc, or GetX for state management — chosen for your team's skill pool
- ›Dio for networking, Freezed + json_serializable for typed models
- ›Isar, Drift, or Hive for offline-first on-device storage
- ›Firebase (Auth, FCM, Crashlytics, Remote Config, Analytics) as the default cloud layer
- ›RevenueCat for unified iOS + Android subscription state
- ›Codemagic or Fastlane for CI/CD with golden tests, unit tests, and integration tests
- ›Laravel, Node.js, or Firebase Cloud Functions on the backend, hosted on your cloud account
What a Flutter app costs — plain numbers, not a range
Flutter app development in India typically starts at around ₹4,00,000 for a compact MVP with sign-up, one core flow, payments, an admin dashboard, and store submission for both platforms. Mid-sized production apps with multi-role users, in-app purchases, offline mode, and third-party integrations usually land in the ₹8-18 lakh range. Larger builds with mobile plus web plus admin plus a hardened backend sit above that, always quoted against a written scope document rather than an hourly rate.
For US and international clients, the same builds run USD $8,000-$14,000 for a compact Flutter MVP, USD $18,000-$40,000 for a mid-sized production app, and USD $50,000 or more for larger multi-platform projects. Comparable US-domestic quotes for equivalent Flutter scope routinely land three to five times these numbers. The difference is overhead structure — Ahmedabad rent, Indian salaries, USD-invoiced work with signed NDA and IP assignment — not craft.
The three variables that move the number most are integration count (each additional third-party service adds real work), design complexity (custom animation and pixel-perfect UI cost more than stock Material widgets), and whether the app needs offline mode with conflict resolution. Payment methods, in-app-purchase surfaces, and role-based access are cheap in Flutter because the ecosystem has hardened around them.
We quote fixed-scope after discovery, so the number in your quotation is the number you pay. Milestone billing means you never pay for a sprint that has not been demonstrated on a real device. When someone quotes a monthly subscription for a custom Flutter build, that is usually a template SaaS product with your logo on it — not the same thing.
Common Flutter project mistakes we help you avoid
Fourteen-plus years of custom software work — and Flutter builds every year since the framework went stable — has given us a shortlist of the mistakes that cost the most on cross-platform projects.
The first is picking Flutter for the wrong reason. Teams sometimes pick Flutter because a blog post said it was the fastest, then hit a hardware wall in month four because the app actually needed native Swift for advanced camera or complex Bluetooth. The platform decision has to come from the product requirements, not the framework leaderboard. We take that call seriously on the first discovery call, before code is written.
The second is treating iOS and Android as identical inside the codebase. Flutter's promise is one codebase, not one design language. Users on iOS expect Cupertino behaviour (large titles, swipe-to-go-back, share sheets); users on Android expect Material behaviour (FABs, ripple effects, back button). We adapt the widget tree per platform where it matters — navigation, sheets, date pickers, permissions dialogs — while keeping business logic single-sourced.
The third is skipping the release pipeline until launch week. Flutter releases move fast, and the first store submission for a new Apple Developer account can take a week of back-and-forth. We stand up TestFlight and Play Internal Track in the first sprint, not the last, so every stakeholder is installing real builds from day one and the store review process is a formality by launch.
The fourth is ignoring golden tests and integration tests. A Flutter codebase without tests is a codebase that will regress on the next OS update. We wire the test matrix into CI from the first sprint so the pipeline blocks merges that break existing flows — cheaper than debugging a production crash three months later.
Our discovery process is designed to catch each of these before code is written.
The next step — a free Flutter app blueprint call
The best way to know whether Flutter is the right pick for your product is a 30-minute conversation. We will ask about the product, the users, the flow you want the app to run, the platforms you need to launch on, and the timeline you are working against. At the end of the call you get a written blueprint — screens, integrations, timeline, and a fixed-price quotation in INR or USD — with no obligation to move forward.
Call +91-99245-12890 or fill the enquiry form on our contact page. We answer the same working day, in your time zone.
Flutter questions founders and product teams ask us first
Everything a founder, CTO, or product owner asks before signing a Flutter scope document. If yours isn’t here, we will answer it on the discovery call.
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