Cross-Platform

Cross-platform app development with the choice made on evidence

Before writing code we map your features against Flutter, React Native, native and PWA, and show what each route costs to build and to own. The proposal explains the recommendation in plain language.

  • Four routes compared honestly
  • Reasons given in writing
  • We build every option
Get a free quote See our work
What is included
  • Feature-by-feature fit check
  • Build and ownership estimate
  • Shared-code map
  • Proof of concept for the risky part
  • Platform-specific UI where it counts
  • Progressive web apps
Get a free quote Reply within one business day. NDA on request.
The problem

Why the framework question stays open

You have asked three agencies which technology to use and received three different answers, each matching what that agency sells. Meanwhile the real questions are still open. Will one codebase truly cover both phones? What will it cost in year two? Would a web app do for now?

This page is how we answer them. We build in Flutter, React Native, Kotlin and Swift, so we have no reason to push one of them. The method below is the one we use in a first consultation: sort the features, look at who will maintain the app, count what is shared and what is not, then choose.

  • Every vendor has a favorite

    Advice arrives pre-decided. The Flutter shop says Flutter, the React shop says React Native, and nobody explains the answer in terms of your feature list.

  • "Write once" turned out to be optimistic

    You were told one codebase means half the cost. Then came platform-specific screens, two store submissions and double the test devices, and the saving shrank.

  • Fear of hitting a wall later

    The first version is simple, but the roadmap includes Bluetooth, background tracking or a widget. You worry a cross-platform choice now forces a rewrite then.

  • Maybe it does not need to be an app

    A responsive web app might cover the need with far less effort. Nobody has laid out what you would give up by skipping the stores.

What we do

How we help you decide and deliver

We begin with a technology assessment as part of the proposal and then build on the route it points to.

Feature-by-feature fit check

Each feature on your list is marked as standard, needs native code or risky on a given framework, so the comparison rests on your product.

Build and ownership estimate

Effort for the first release and a realistic view of yearly upkeep for each route, including testing, store work and OS updates.

Shared-code map

A plain list of what will be written once and what will exist per platform: permissions, push setup, payments, deep links and platform UI.

Proof of concept for the risky part

When one feature could decide the outcome, we prototype that piece first on a real device before you commit the full budget.

Platform-specific UI where it counts

Shared screens that still adapt navigation, pickers, gestures and typography, so neither iPhone nor Android users feel they got the other platform's app.

Progressive web apps

Installable, offline-capable web apps for cases where a browser is enough, built so a store app can reuse the same API later.

Typical projects

Situations where this decision comes up

01

A startup validating an idea

Limited budget, both platforms needed on day one and a feature set that will change monthly. Usually a single shared codebase, with native kept in reserve.

02

A business with a web portal

Customers already log in on the web. The question is whether a PWA covers mobile use or whether push notifications and store presence justify an app.

03

Two native apps that cost too much

Separate iOS and Android teams ship features months apart. We assess whether consolidating into one codebase pays back, and plan the move screen by screen.

04

An app with one hard native feature

Most screens are forms and lists, but one depends on Bluetooth, NFC or background location. We test that piece first on real hardware, then decide.

In depth

A framework for choosing your app technology

Step one: sort your features into three piles

Write down everything the app must do in its first year. Pile one is standard: accounts, lists, forms, search, payments, chat, maps, media, push notifications. Any option handles these. Pile two is native-leaning: Bluetooth devices, continuous background location, home screen widgets, watch apps, advanced camera or audio processing. Pile three is store-dependent: in-app subscriptions, being found in app store search, dependable push on iPhone. If pile two is empty or small, a shared codebase is safe. If pile two is the product, go native. If pile three is empty and reach matters more than polish, a PWA deserves a serious look.

Step two: ask who will own the code

Frameworks are maintained by people. A company with React developers will keep a React Native app healthy. A company with no mobile staff, relying on us or another agency, is usually better served by Flutter, which brings its own interface layer and leans less on third-party packages for basics. A company with native engineers already on payroll should think hard before retraining them. The cheapest technology is the one your future team can change without fear.

Step three: be realistic about shared code

One codebase does not mean one of everything. Screens, business logic, networking and local storage are written once. Around them sits work that stays per platform: signing and build configuration, push notification setup, permission texts, in-app purchase products, deep link registration, store listings, screenshots and review. Testing is not halved either, since every release still has to be checked on iPhones and on a range of Android devices. The saving against two native apps is real and it grows as each new feature is built once, but it is smaller than the phrase "write once" suggests.

Step four: cost of building against cost of owning

Build cost follows the number of screens, roles and integrations, and differs less between frameworks than people expect. Ownership cost differs more. Two native apps mean two sets of dependencies, two release trains and features that drift apart. A cross-platform app means following one framework's upgrade cycle and occasionally waiting for a plugin to catch up with a new OS feature. A PWA has the lowest upkeep and the fewest capabilities, with no store listing, weaker background behavior and more limited push and hardware access on iPhone than on Android.

How the choice usually falls

  • Flutter: both platforms, custom-branded interface, no existing React team.
  • React Native: an established React and TypeScript web product and the people who built it.
  • Native Kotlin and Swift: the app is built around device or OS features, or one platform is all you need.
  • PWA: content, forms and dashboards where store presence and deep device access are not required.

Mixed answers are fine. A cross-platform app with a few native modules covers most "what if" worries, and starting with a PWA on a well-designed API keeps the door open for a store app later.

Process

From open question to a build plan

  1. 1

    Feature and team intake

    A call and a short questionnaire covering features for the first year, the devices your users carry, existing systems and who will maintain the app.

  2. 2

    Assessment and proposal

    You receive the sorted feature list, a comparison of the viable routes with effort ranges, and our recommendation with the reasoning spelled out.

  3. 3

    Prototype the unknown

    If one feature is uncertain, we build a small proof of concept on real hardware so the decision rests on something you can hold.

  4. 4

    Build on the chosen route

    Design, development, QA and store release follow in sprints, with shared and platform-specific work tracked separately in the plan.

  5. 5

    Review after launch

    Once usage data arrives we revisit the choice: what to add natively, what to keep shared and whether a web version is worth adding.

Deliverables

What the decision leaves you with

  • A technology recommendation you can show stakeholders
  • A feature list sorted by technical risk
  • A clear map of shared and per-platform code
  • An ownership estimate alongside the build quote
  • An app architecture that leaves room for native modules
FAQ

Cross-platform questions worth asking

Is cross-platform always cheaper than native?
Cheaper than two native apps, nearly always. Cheaper than one native app, no. If you only need iPhone or only Android for the foreseeable future, a single native app can cost about the same and avoids a framework layer.
Flutter or React Native: which do you recommend?
Flutter for most clients without an in-house React team, React Native when a React and TypeScript web product and its developers already exist. Both produce good apps. The deciding factor is who maintains the code, which we discuss before quoting.
Will users notice that the app is not native?
Not if the platform details are respected. Navigation, back gestures, pickers, keyboard behavior and text scaling should follow each system. We budget time for that adaptation, because identical screens on both platforms are what make an app feel foreign.
Could a PWA replace an app for us?
Sometimes. A PWA suits dashboards, booking, catalogs and internal tools used on mixed devices. It is a poor fit when you rely on app store discovery, in-app subscriptions, strong push engagement on iPhone or hardware such as Bluetooth. We test your feature list against those limits.
What happens if we outgrow a cross-platform framework?
It rarely means starting again. Both Flutter and React Native let you write individual features in native code and keep the rest shared. A full move to native is usually only justified when the product itself has become a platform feature.
Do both platforms launch at the same time?
They can. One codebase produces both builds, though each store reviews separately and may ask for different changes. Some clients release on one platform first to learn from real users, then follow with the second shortly after.
Does the backend change depending on the framework?
No. The app talks to the same API whichever route you choose, which is why we design the backend first. A clean, versioned API also lets you add a web app or switch client technology later without touching the server. See API development and integration.
Related

Flutter App Development

React Native App Development

Android App Development

iOS App Development

Web Application Development
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Get a straight answer on your app stack

Send us your feature list and tell us who will maintain the app. We reply within one business day, and the free consultation ends with a clear recommendation and a quote.

  • Free consultation and quote
  • NDA on request
  • You own the source code
  • Reply within one business day
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