01 Flutter

Flutter app development company: apps planned as a whole product

Tailwebs is a Flutter app development company in Bengaluru that designs, builds and launches apps for iOS and Android from one codebase. Since 2015 we have delivered 200+ projects for 100+ clients. Flutter suits apps that need a custom, consistent interface on both platforms, a fast first release and one team to maintain it afterwards.

Talk to us about your Flutter appWhat's shared, and what isn't
Illustration: a paint roller printing the same Fincurry screen onto two phones

02 When it fits

When Flutter fits

Flutter fits when you want one codebase for both app stores, with a custom brand-led interface.

Project traits

  1. You need the same custom interface on iOS and Android. For example, a consumer app whose brand depends on a distinctive, animated interface.
  2. You want one team and one release process. For example, a startup MVP that must launch on both stores within one budget.
  3. Speed to a first release matters. For example, a companion app for an existing web platform, sharing its API.
  4. Staff use mixed phones. For example, a field or internal app that has to work offline and sync later.
  5. Two separate codebases have drifted apart. For example, an iOS app and an Android app that no longer match, rebuilt as one.

03 One codebase

Flutter app development for iOS and Android: what's shared and what isn't

"One codebase" is true for most of the work. The rest is done per platform, and it is planned from the first week, so launch week holds no surprises.

Shared, written once

  • Screens, layout and navigation
  • Business logic and app state
  • The API client that talks to your backend
  • Unit, widget and integration tests
  • One CI pipeline that builds both apps

Per platform, done for each store

  • Store listings and screenshots
  • Signing and certificates
  • The wording of each permission request
  • Push-notification set-up
  • In-app purchase rules
  • Native SDKs, reached through platform channels
  • Each store's review

The per-platform list is short, but each item can hold up a launch: a missing certificate or an unclear permission request is enough for a store to send a build back. The app is rarely the whole product, either: its backend, admin panel and analytics are planned with it, as in mobile app development. We work this way on our own Flutter apps, Fincurry and ApnaStaff, both live on Google Play and the App Store, and on the Cook and Chef app, where our team supports theirs.

04 Day one

Flutter app development services start with architecture decisions

Whether a Flutter codebase is easy to live with a year later is mostly settled in its first week.

How we build

  1. State management

    How data moves between screens. Changing it later means touching nearly every screen, so it is chosen once, for the size and shape of the app.

  2. Project structure by feature

    Code is grouped by feature, not by file type, so a feature can be found, changed or removed in one place as the app grows.

  3. Flavours for development, staging and production

    Separate builds with their own settings and servers, so testers never touch live data and a release is never built against the wrong backend.

  4. A theme and component library

    The brand lives in one set of colours, type and components, designed with UI/UX design, so every screen stays consistent on both platforms.

  5. Platform channels for native features

    Where the app needs something Flutter doesn't reach, such as a device SDK, a small native bridge is planned for each platform from the start.

  6. Offline storage and sync

    What the app keeps on the phone, and which edit wins when two clash, shapes the data model, so it is settled before the first screen is built.

  7. Analytics and crash reporting

    Events and crash reports are wired in before launch, so the first users' sessions are measured rather than guessed at.

  8. A test mix

    Unit tests for the logic, widget tests for the screens, golden tests that catch an unintended visual change, and integration tests for the key flows on both platforms.

How performance is measured

  • Profiling on real devices

    Slow screens are found with Flutter DevTools, on real phones in profile mode rather than on a debug build.

  • A frame-time target

    Scrolling and animation are held to a frame-time target, checked on a modest phone as well as a flagship.

  • An app-size budget

    A limit on the download size, checked in CI on every build, so the app never grows unnoticed.

Each decision is written down with its reason and handed over with the source code. The frame-time target and app-size budget are agreed with you at the start.

05 Upgrades

Changing Flutter development company: upgrades and takeovers

Yes: we upgrade older Flutter apps and take over Flutter apps that another company built.

  1. Code review first

    An upgrade or takeover starts with a review of the SDK version, packages, tests and store set-up, and a written list of what to fix first.

  2. Null safety

    An app that predates null safety is migrated to it before anything else.

  3. One release at a time

    The Flutter SDK and packages move up one supported release at a time, with the tests run at each step.

  4. Dead packages replaced

    Packages that are no longer maintained are swapped for supported ones.

Moving from two native apps instead? Flutter screens can be added inside an existing iOS or Android app (Flutter calls this add-to-app), so a move can happen a screen at a time, without a big-bang rewrite.

Running an older Flutter app? Tell us which version it is on.

Hiring instead?

Need Flutter developers in your own team? Hire Flutter developers

06 FAQ

Questions about Flutter app development.

Is Flutter a good choice for my app?
Flutter is a good choice when you want one team to ship the same custom interface to iOS and Android quickly, with native code only where a device feature needs it.
How much does Flutter app development cost in India?
In our draft cost bands, a simple app costs ₹3–6 lakh, a cross-platform MVP ₹8–15 lakh and a mid-complexity app with a web admin ₹15–30 lakh. What moves the figure is in our app development cost guide.
How long does it take to build a Flutter app?
Our draft MVP Launch package takes 8–14 weeks from design to launch, depending on the core flow and integrations.
What has to be done separately for iOS and Android in a Flutter app?
The screens and logic are shared, while store listings, signing, permission wording, push setup, purchase rules and any native SDKs are handled per platform.
Can you upgrade an old Flutter app to the current SDK?
Yes: we upgrade older Flutter apps to the current SDK.We upgrade the SDK and packages in steps, migrating to null safety first if the app predates it.
What does a Flutter app cost to maintain after launch?
Plan for about 15–20% of the build cost a year, plus hosting and store fees: Apple charges $99 a year and Google $25 once. Every package and plan is on our pricing page.