One Codebase, Both Platforms

Cross-Platform App
Development

Name: Appverra
Address: 20 N Moore St, New York, NY, 10013, US
Telephone: (213) 714-7176
Price range: $$

We build one app that ships to iPhone and Android together — from a single codebase, for roughly a third less than two separate native builds. We are Flutter-first, and we use React Native where it is the better fit. 150+ apps shipped, 700+ customers, millions of downloads. Cross-platform MVPs from $7,997, with a $1,997 Discovery Sprint to scope your build first.

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When one codebase is the smart choice

Most founders do not actually need two apps — they need their product on both phones. Building separate native apps in Swift and Kotlin means two codebases, two teams, two sets of bugs, and two timelines for the same features. For the large majority of apps, a single cross-platform codebase delivers the same product to iOS and Android faster and for far less. We recommend cross-platform when:

You need iOS and Android together. Your market is on both platforms and you cannot afford to launch on one and make the other wait six months.
You are on a startup budget and timeline. One team and one codebase fits a funded MVP; staffing two separate native builds usually does not.

Your app is screens, an API, and business logic. Marketplaces, SaaS companions, booking, social, fintech front-ends, on-demand — the apps most startups build are an ideal cross-platform fit.
You want true feature parity. A new feature ships to both stores at once, and a bug is fixed in one place — not twice, slightly differently.

This page is the hub for that decision. Below we help you choose your framework and hand you off to the right deep-dive — our Flutter app development page and our React Native development page. And if cross-platform is the wrong call for your product, we say so and point you to native instead.

Flutter or React Native?

Both ship one codebase to both platforms, and both are excellent. The right pick depends on your team and your product, not on hype. Here is how we actually choose — and the dedicated page for each, so you can go deeper.

Flutter — our default

Flutter renders its own UI, so screens look pixel-identical on iOS and Android and animations stay smooth even on older devices. It is our first recommendation for most new apps: fast to build, consistent, and rock-solid in production. We are a Flutter-first shop and it is where most of our 150+ apps are built.

See Flutter app development →

React Native — when JavaScript fits

If you already have a React or JavaScript team that will own the app long-term, or you want to share logic and patterns with a React web product, React Native is the pragmatic choice. It uses real native components and a mature ecosystem that your existing engineers will feel at home in.

See React Native development →

Not sure which? That is exactly what the Discovery Sprint settles. We look at your team, your roadmap, and whether you have a web product to share code with, then give you one clear recommendation — instead of leaving you to guess.

What a single codebase actually saves you

The win is not a marketing slogan — it is real, and it is honest about its limits. Here is where the time and money actually go further:

One build, both stores

Design, business logic, and most testing happen once and serve iOS and Android together — not twice in two languages.

Roughly a third less

A single cross-platform build typically costs a third to a little under half of two separate native apps — most of a second team\'s budget, saved.

Fix once, ship once

One bug fixed in one place, one feature shipped to both stores at the same time — no drift between platforms.

The honest caveat: it is not a clean fifty-percent saving. Store submission, native integrations, and per-platform polish are still platform-specific work. When your app needs a backend, payments, or an admin dashboard, our full-stack team builds it alongside the app so both platforms share one source of truth.

When we will tell you to build native instead

We are a cross-platform shop, and we still turn down cross-platform work when it is the wrong tool. We recommend a native build when your product genuinely lives in one platform\'s depth:

You are single-platform for the next year. Genuinely iPhone-first or Android-first roadmaps move faster on one native stack. See our iOS app development and Android app development pages.
The platform is the product. Deep Apple ecosystem features, heavy on-device machine learning, or full augmented reality belong in a native build.

Performance is the whole game. Console-grade graphics and the most demanding real-time apps are still best served natively.
You are extending a native app. If you already have a mature Swift or Kotlin codebase, bolting on cross-platform rarely pays — we will tell you honestly.

Cross-platform app development pricing

Fixed-bid and agreed up front after the Discovery Sprint — and every tier covers both iOS and Android, not one platform. Most funded-startup MVPs land between Launch and Growth.

Discovery Sprint

$1,997

Scope + prototype

Starter

$7,997

Focused MVP

Launch

$14,997

App + backend

Growth

$29,997

App + backend + admin

Scale

$59,997

Multi-role, high-scale

What we don\'t build

We say no to work we are not the right team for, on the first call — never after taking your money. We don\'t build games (Unity or Unreal), HIPAA-regulated clinical systems, heavy on-device machine learning, full augmented-reality experiences, or blockchain and Web3 apps. If that is your project, we tell you up front and point you toward a team that fits.

FAQ’s

Cross-Platform App Development FAQs

It means we write your app once and ship it to both the App Store and Google Play from a single codebase, instead of building and maintaining two separate native apps. One team, one set of business logic, one place to fix a bug. For the large majority of apps — anything built around screens, an API, payments, and standard device features — that is the faster, cheaper way to reach both platforms with the same features at the same time.

We are a Flutter-first agency because Flutter renders its own UI, which gives us pixel-identical screens on iOS and Android and very smooth performance out of the box. We reach for React Native when you already have a React or JavaScript team that will maintain the app, or when you want to share logic with a React web product. On the Discovery Sprint we give you a straight recommendation based on your team and roadmap, not a default. You can read more on our dedicated Flutter and React Native pages.

For the vast majority of apps, yes — users cannot tell, because the app uses native navigation, gestures, and components and runs at 60fps. The honest exceptions are apps where the platform itself is the product: heavy real-time graphics, console-style games, deep augmented reality, or apps built almost entirely around one platform's exclusive frameworks. For those we will recommend native iOS or Android instead, and tell you so up front.

Roughly a third to a little under half, depending on the app. You are funding one codebase and one team instead of two, so design, business logic, and most testing are done once. It is not a clean fifty-percent saving — some work is still platform-specific, like store submission, native integrations, and per-platform polish — but a single cross-platform build is almost always the smarter spend for a startup that needs both platforms.

Our fixed-bid tiers run from a $7,997 Starter build to a $59,997 Scale build, with most funded-startup MVPs landing between $14,997 and $29,997 — for both iOS and Android. Most MVPs ship in about six weeks from the end of the $1,997 Discovery Sprint, which scopes the app, delivers a clickable Figma prototype, and gives you a fixed price before you commit.

When your product genuinely lives in one platform's capabilities for the next year — deep Apple ecosystem features, heavy on-device machine learning, console-grade graphics, or full AR — a native build is the right call, and we will tell you. If you are iPhone-first or Android-first for now, we point you to our native iOS or Android pages instead of selling you a cross-platform build you do not need.

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