NORTHELL
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CROSS-PLATFORM APP DEVELOPMENT

Cross-Platform App Development Services

Two native apps mean two codebases, two teams, and two sets of bugs. We build one — in Flutter or React Native — that ships native-like to iOS and Android together, and drop to native modules only where a feature genuinely earns it.

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BONUS Free: Cross-Platform vs Native Decision Checklist — The questions we work through to decide whether your product should be cross-platform, native, or hybrid — before anyone commits a budget.

We reply within one business day. No spam, no obligation.

In short: Northell builds cross-platform mobile apps from a single Flutter or React Native codebase that ship native-like experiences to iOS and Android at once — lower cost to build and maintain than two separate native apps, without giving up performance where it matters.
CAPABILITIES

What Cross-Platform App Development Covers

Single-codebase builds

One Flutter or React Native codebase reaching both stores, so a feature is written, tested, and maintained once — not twice.

Native-like UX

Platform-appropriate navigation, gestures, and animations that run at native frame rates, so the app feels built for each OS.

Native modules on demand

Where a screen needs camera, Bluetooth, or heavy real-time work, we bridge to native for that piece only.

Store release & CI

Automated builds, signing, and App Store / Play Store submission wired up so shipping an update is routine, not an event.

FIT CHECK

Built for Specific Buyers, Not Everyone

Founders shipping to both stores

Need iOS and Android at launch on a startup budget, without funding two native teams.

Product teams consolidating apps

Maintaining separate native codebases and want one team and one release train instead.

CTOs scaling an MVP

Have validated demand and need the app re-architected to hold up as usage grows.

If your app's core value is high-end 3D, AR, or console-grade graphics, cross-platform is the wrong tool and we'll tell you to go native rather than sell you a compromise.

PROCESS

From Kickoff to Launch

01

Product & platform scoping

We map features to the right platform strategy and pick Flutter or React Native with the reasoning written down.

→ Scope + framework decision
02

Architecture & design

State management, navigation, and a component system set up so the codebase scales past the MVP.

→ Architecture + UI kit
03

Build & native bridges

Feature build on the shared codebase, dropping to native modules where a feature requires it.

→ Working app on both OSes
04

QA & store release

Device-matrix testing, then signed builds submitted to both stores with CI in place.

→ Live on App Store & Play Store
STACK

Technologies We Use

Frameworks
FlutterReact NativeDartTypeScript
Native
Swift modulesKotlin modulesPlatform channels
Backend
Node.jsREST/GraphQLFirebase
Delivery
FastlaneCI/CDCrash & analytics
TODO cross-platform apps shipped — not yet tracked separately from our 155+ project count
TODO average time to both app stores
TODO code shared across iOS and Android
FAQ

Common Questions About Cross-Platform App Development

Cross-platform or native — how do you decide?

We start from your product, not our preference. If most of the app is standard product UI, data, and networking, cross-platform gives you one codebase and a faster, cheaper path to both stores. If the core experience leans on heavy real-time graphics, deep OS integration, or platform-specific hardware, we say so and scope native or a hybrid instead. You get the recommendation with the reasoning, before any code is written.

Flutter or React Native?

Both are production-grade; the choice depends on your team and product. React Native fits teams already invested in the JavaScript/React ecosystem and products that share logic with a web app. Flutter fits products that want pixel-identical UI across platforms and high-fidelity custom design. We pick per engagement and explain the trade-off rather than defaulting.

Will a cross-platform app feel as good as a native one?

For the large majority of apps, users cannot tell the difference — the frameworks render close to native and animations run at native frame rates. Where a specific screen needs native performance or a platform API the framework does not cover, we drop to a native module for that piece only, so the 90% you share stays shared and the 10% that needs native gets it.

Can you take over an existing cross-platform app?

Regularly. We start with an architecture and code review to understand why it stalled or where it is fragile before writing new features, because most stuck cross-platform apps have a state-management or native-bridge problem, not a framework problem.

Do we get the source code?

Yes. You own the full codebase, the app-store accounts stay yours, and there is no proprietary wrapper you would have to hire us specifically to maintain later.

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