React Native App Development
One codebase. iOS and Android. TypeScript throughout. The New Architecture running in production — not just in the release notes.
React native app development from NextEnvision delivers cross-platform mobile apps that actually feel native — because we use the New Architecture, write TypeScript with strict mode enabled, and don't skip the performance work that separates apps users keep from apps users delete. We build for agencies in Australia, the United Kingdom and Singapore who need iOS and Android delivered together, under budget, without compromising on what the app feels like.
What Good React Native App Development Actually Looks Like
React native app development has a reputation problem it doesn’t entirely deserve. A lot of apps that feel sluggish, janky, or “webby” on device were built by teams that treated React Native as a web project that happens to run on phones. The JavaScript thread is overloaded with business logic. Animations run on the JS thread instead of the UI thread. Native gestures compete with scroll views in ways that React Navigation’s default configuration doesn’t resolve. None of that is a React Native problem — it’s an engineering problem.
Done properly, React Native with the New Architecture enabled — JSI for synchronous native communication, Turbo Modules for on-demand native module loading, and the Fabric renderer for concurrent UI updates — produces apps that are difficult to distinguish from their fully native equivalents in everyday use. We build on the New Architecture by default, write TypeScript with strict mode, and use Reanimated 3 for animations that run natively on the UI thread. That’s what our react native app development looks like in practice. Visit our mobile app development page for the full scope of what we build.
React Native App Development Services
Six react native app development services. TypeScript. New Architecture. Shipped to both stores.
Cross-Platform iOS and Android from One Codebase
One TypeScript codebase, two production apps — but only if the shared code actually works correctly on both platforms. We test iOS and Android throughout development, handle platform divergence with Platform.select and platform-specific component files, and ship both builds in the same sprint cycle.
TypeScript with Strict Mode and Type Safety Throughout
TypeScript with strict: true from project init — no implicit any, no unhandled nulls, no inferred return types where correctness matters. API response types generated from OpenAPI specs where available, discriminated unions where they’re not. The business logic layer compiles clean.
State Management with Zustand, Redux Toolkit, or Jotai
State management matched to complexity: Zustand for apps with straightforward global state, Redux Toolkit with RTK Query for complex server state and cache management, Jotai for fine-grained atomic state. The choice is documented in the architecture decision record before sprint one — not decided mid-project when it’s expensive to change.
React Navigation and Deep Linking
React Navigation with typed route params that catch navigation errors at compile time, deep link scheme configuration, Universal Links for iOS, and the nested navigator structure that doesn’t require refactoring when the app reaches its tenth screen. Navigation is set up correctly from sprint one.
React Native New Architecture and Performance Engineering
New Architecture by default: JSI for synchronous native communication, Turbo Modules for on-demand native loading, Fabric for concurrent UI updates. All third-party dependencies verified for New Architecture compatibility before they’re added. Reanimated 3 worklets for animations that never touch the JS thread.
App Store and Google Play Submission
Both stores handled — iOS App Store and Google Play. Correct signing configurations, provisioning profiles, Android keystore via Play App Signing, metadata at every required asset size, and review notes for non-obvious functionality. Fastlane automates the build and submission pipeline so every release is identical.
When React Native Is the Right Choice and When It Isn't
React native app development is the right choice when the agency’s client needs iOS and Android with a single development team, the UI is composed primarily of standard mobile patterns (lists, forms, tabs, modals, maps), and there’s no hard dependency on platform-specific hardware APIs that React Native doesn’t expose through its native module ecosystem. That covers a large percentage of consumer and B2B mobile applications. The honest answer is that for most apps agencies commission, React Native delivered well produces a better outcome than native iOS and Android delivered separately at twice the budget.
React Native is the wrong choice when the app is deeply hardware-dependent — real-time audio processing, ARKit/ARCore with frame-level rendering control, Bluetooth LE peripheral management that requires custom native protocols — or when the platform UX needs to be different enough between iOS and Android that the shared codebase becomes a liability rather than an asset. We build native iOS, native Android, and React Native. We’ll recommend whichever one fits the client’s project rather than defaulting to the technology we happen to be pitching. See our case studies for examples of both decisions made on real projects.
4 Technical Capabilities Behind Every React Native App We Deliver
Expo: When to Use It and When to Eject
Hermes Engine and JS Thread Performance Optimisation
Expo‘s managed workflow eliminates Xcode and Android Studio configuration, provides OTA updates via EAS Update, and handles signing through EAS Build. We use it when the project stays within Expo’s SDK scope. When custom native modules are needed, we use the bare workflow or Expo modules with custom native code — getting EAS Build’s convenience without the managed workflow ceiling.
Custom Native Modules for Device-Specific APIs
Hermes is the default JS engine since React Native 0.70 — AOT-compiled, faster startup, lower memory usage. What matters beyond the engine is JS thread load: heavy synchronous computations, unwindowed large lists, and state updates inside scroll handlers will saturate the thread on mid-range Android regardless of engine. We profile with Flashlight before launch, not after users report it.
Jest and React Native Testing Library Coverage
JSI enables synchronous, zero-copy JS-to-native communication — what makes Reanimated 3 worklets possible and what unlocks native modules that respond without bridging latency. Where the community ecosystem doesn’t cover a device API, we write native modules in Swift (iOS) and Kotlin (Android) exposed through the New Architecture’s Turbo Module system.
Fastlane and EAS Build for Automated Delivery
Jest with React Native Testing Library for component and hook tests — interactions through accessibility semantics, not implementation details. Detox for E2E tests covering critical user journeys on real device or simulator, running in CI on every release branch build before the submission pipeline starts.
White Label React Native App Development for Agencies
Your agency wins a cross-platform mobile project. The client wants iOS and Android. Your team doesn’t have a dedicated React Native engineer. That’s exactly what our white label react native app development is for. We deliver the app — TypeScript codebase, both platform builds, both store submissions — under your brand. The client sees your agency’s name on everything. We stay invisible.
Through our white label development service: mutual NDA before any brief is shared, full IP transfer on project completion, zero NextEnvision identifiers in the codebase or any deliverable, and AEST and GMT coverage so your Australian and UK clients get same-day responses.
If your agency regularly wins cross-platform mobile work, our agency partner programme gives you a structured React Native delivery pipeline across multiple projects — not a fresh negotiation every time a new brief lands.
Why React Native App Quality Varies So Much Between Development Teams
The same framework produces dramatically different results depending on who’s using it. A react native app development team that comes from a web background will often treat the app like a mobile-optimised website: state lives in components, API calls fire inside useEffect with missing dependency arrays, large lists render without FlashList or windowing, and the navigation structure is built around what the web router pattern suggests rather than what native mobile navigation expects. It works in development. On a mid-range Android device with a real API backend and real user data, it’s slow.
We come from mobile — engineers who understand what makes a mobile app feel responsive, not web engineers adapting to a new deployment target. That means the architecture decisions in our react native app development reflect how React Native actually executes: what runs on the JS thread and what shouldn’t, where Reanimated worklets need to replace Animated API calls, and why the list component choice matters as much as anything else in a data-heavy app. Contact us via the contact page to discuss your project requirements.
React Native App Development Engagement Models
Scoped React Native App — Brief to Both Stores
Dedicated React Native Engineer
Fixed-scope react native app development from brief through dual App Store submission. Discovery produces the technical spec, architecture decision record, Expo vs bare workflow decision, state management selection, and sprint plan before a line of TypeScript is written. TestFlight and internal Play Store builds on every sprint merge. Full source code and architecture handover on completion.
Suited to agencies with a defined brief and timeline who need accountability for the complete engineering scope on both platforms.
White Label React Native Delivery
A senior React Native engineer embedded in your team monthly. Participates in sprints, available in your working hours, commits to your repositories. Covers the TypeScript, the native module work, the platform-specific edge cases, and the store submissions. Suited to agencies with recurring cross-platform mobile client work who need reliable React Native capacity.
React Native Performance Audit and Remediation
Complete react native app development and delivery under your agency brand. NDA. Full IP transfer. Zero NextEnvision identifiers. Both store submissions managed. We present to clients as part of your team if required. See our white label development page for full terms.
React Native Upgrade and New Architecture Migration
An existing React Native app profiled with Flashlight and the React Native debugger to identify the specific causes of frame drops, slow list renders, and JS thread overload — with a written report ranking findings by user-visible impact and a remediation sprint plan. Contact us via the contact page to scope a performance audit.
How We Deliver React Native App Development Projects
Discovery: Architecture, State Strategy, and Expo vs Bare Workflow Decision
Sprint Zero: TypeScript Config, EAS Build, and CI Pipeline
Discovery for react native app development produces a written spec covering: the navigation structure and deep link scheme, state management selection with rationale, Expo managed vs bare workflow decision, third-party library audit for New Architecture compatibility, and the sprint plan. These decisions are harder to reverse mid-project than in most frameworks — so we make them explicitly, in writing, before touching code.
Feature Sprints: TypeScript Development with Platform Testing
Sprint zero configures the project properly: TypeScript with strict mode, ESLint with React Native rules, Prettier, Husky pre-commit hooks, EAS Build configured for both platforms, and the CI pipeline running TypeScript type checks, ESLint, Jest unit tests, and a build verification on every pull request. Both platforms build from the start. No deferred Android testing.
Integration Sprints: Native Modules and Third-Party SDK Work
Two-week sprints with TestFlight and internal Play Store track builds at sprint end — installable on both platforms the same day the sprint merges. We test on physical devices at each sprint end, not just Simulator and Emulator. Android mid-range device testing starts sprint one, because performance issues surface on low-to-mid-range Android that never appear on an iPhone 15 Pro or a Pixel in developer mode.
QA Sprint: Performance Profiling, Accessibility, and Store Review Prep
Native module integrations — device APIs, proprietary SDKs, custom BLE protocols — are implemented in the integration sprints with TypeScript interfaces defined before the native implementation begins. The JavaScript layer depends on the interface, not the native implementation directly, so mock implementations work in tests and the native code is independently replaceable.
Dual Store Submission: iOS App Store and Google Play
Pre-submission QA: Flashlight performance profiling on a mid-range Android device, frame rate verification on the critical user journeys, accessibility label review, both platform builds tested against the production API. Store assets prepared for both platforms simultaneously — screenshots, feature graphics, metadata — so iOS and Android submissions go in at the same time.
Handover: Source Code, Architecture Docs, and OTA Update Setup
Dual App Store submission via Fastlane or EAS Submit — both platforms in the same pipeline run, same signing credentials managed in EAS Secrets, same review queue management. iOS and Android reviews happen in parallel. Handover covers the TypeScript source, architecture decision record, EAS project configuration, and OTA update setup via EAS Update for post-launch patches that don’t require a full store resubmission. Visit our mobile app development page for the full scope.
React Native App Development FAQs
Questions agencies ask before commissioning a React Native cross-platform project.
When should you choose React Native over native iOS and Android development?
React native app development is right when you need iOS and Android from one team at roughly half the cost of two separate native builds, and the UI is composed of standard mobile patterns — lists, forms, tabs, maps, modals — rather than deep hardware-specific integrations. Most B2B tools, consumer apps, and internal enterprise apps fall comfortably in range. Where React Native struggles is real-time audio processing, frame-level AR rendering, and custom BLE peripheral protocols. We build native iOS, Android, and React Native, so we’ll recommend whichever fits.
What is the difference between Expo managed workflow and bare React Native?
Expo managed workflow provides a pre-configured environment where builds, signing, and OTA updates run through EAS Build and EAS Update without local Xcode or Android Studio setup — faster to start, easier to maintain. The constraint is that you’re limited to Expo’s SDK for native modules. Bare workflow gives full native code access with the option to use EAS Build for CI. We default to Expo where the SDK covers requirements and use bare workflow when it doesn’t.
How does the React Native New Architecture improve performance?
The Old Architecture sent every JS-to-native call over an asynchronous JSON bridge — serialise, send, deserialise, respond. The New Architecture replaces this with JSI: direct, synchronous, zero-copy communication between the JS engine and native code. The practical results are faster app startup, smoother animations via Reanimated 3 worklets that run natively, and Turbo Modules loaded on demand rather than all at startup.
What state management do you use for React Native app development?
For most react native app development projects, Zustand is our default — minimal boilerplate, hooks-based API, straightforward async handling. For apps with complex server state, cache invalidation, and optimistic updates, Redux Toolkit with RTK Query handles caching and background refetching in a way Zustand’s simplicity doesn’t. Jotai works well for fine-grained atomic state where minimising unnecessary re-renders matters.
Do you offer white label React Native app development for agencies?
Yes. React Native projects delivered under your agency brand — zero NextEnvision references in the TypeScript codebase, EAS project config, App Store Connect, Play Console, or any deliverable. NDA before any brief is shared. Full IP transfer on completion. AEST and GMT coverage. See our white label development and agency partner programme pages for details.
How is a React Native app tested before release?
React native app development testing uses Jest with React Native Testing Library for component and hook unit tests — interacting through accessibility semantics, not implementation details. Detox E2E tests cover critical user journeys on a real device or simulator and run in CI on every release branch build. Manual testing on a physical mid-range Android device happens throughout development — performance issues that only appear on real hardware won’t surface in an emulator.