React Native Development Services for US & EU Mobile, Tablet and Embedded Products

React Native wins when your team already lives in TypeScript and React on the web (massive code, design-system and engineer reuse), when over-the-air JS updates materially change your release cadence, and when most of your app is screens-on-top-of-APIs rather than custom rendering. Flutter wins for pixel-perfect cross-platform UI parity with custom design systems. Native Swift/Kotlin wins for deep OS integration, AR/VR, and platform-specific premium UX. Kotlin Multiplatform wins for sharing business logic between existing native teams without committing to one UI framework. We run all four practices and recommend honestly during discovery.

React Native 0.76+ is our default and the New Architecture (Fabric + TurboModules + Bridgeless mode) is enabled by default since 0.76 (October 2024) and is production-ready in 2026. We have shipped New-Architecture apps with 2M+ MAU on iOS and Android. Hermes is mandatory (default since 0.70). TypeScript 5 strict. Minimum supported iOS 15.1, Android API 24. We pin RN version per-project, hold one minor release behind latest stable in production, and upgrade quarterly with a dedicated upgrade sprint — never let an RN version sit unsupported.

Yes. Backend defaults to EU regions (AWS eu-central-1, GCP europe-west3, Supabase eu-central-1) with KMS keys held in the customer account. App Store Privacy Manifests (mandatory from May 2024) shipped with every required-reason API and SDK data collection declared — React Native and common RN libraries all need this and we keep an internal compatibility matrix. Play Data Safety section completed against the actual SDK inventory. GDPR consent via UMP or custom CMP, Apple ATT prompt where IDFA is needed. We ship CCPA notices for US consumer products.

Default starting point: Expo prebuild (formerly bare with config plugins). It gives you Expo SDK ergonomics (EAS Build, EAS Update, expo-router) plus the freedom to write native modules in Swift / Kotlin without ejecting. Pure managed when you have zero native module needs and want absolute minimum infra (early MVP, internal tools). Pure bare when you have deep native integrations from the start (custom BLE protocols, hardware SDKs, large existing native codebase to integrate). 80% of our 2026 engagements start as prebuild.

Yes, this is a common engagement. We use the official RN Upgrade Helper and the per-version migration guides as the spine, but each app is bespoke because of native modules. Step 1: audit every native module for New Architecture compatibility — replace unmaintained ones. Step 2: stepwise upgrade 0.68 → 0.71 → 0.73 → 0.76 with green tests at each step. Step 3: enable New Architecture per-platform behind a flag, ship to internal beta, monitor JS crash rate and ANR for two weeks. Typical 60k-LOC app takes 2 to 4 months without a feature freeze.

React Native work is fixed-scope and all-in, quoted in USD across four project tiers. An MVP runs from $3,500 (4–8 weeks): one RN codebase, a first working app with a core flow, iOS and Android, and a store release. A production app starts from $5,800: several features, backend integration, offline persistence, analytics and a store release. A full product starts from $9,200: multiple modules, roles, external integrations, CI/CD and real-device QA. A complex app starts from $11,500: native modules, payments, offline-first sync, scale and A/B. The exact number depends on native-module depth, integration count, offline and sync requirements and compliance surface. You see the line-item budget before any code is written. All engagements include a CET workday with a 9 AM–1 PM ET overlap for US clients and NDA, DPA and IP assignment signed before kickoff.

Push via react-native-notifications (Wix) or @notifee/react-native for rich media, action buttons, and background handlers. APNs certificate and FCM server key are managed through EAS Credentials or the project’s own keystore — we never hold production push credentials. Deep links use Universal Links (iOS, apple-app-site-association on HTTPS server) and Android App Links (assetlinks.json) for secure verified linking, with react-navigation URI-scheme routing for internal navigation. Campaign attribution uses AppsFlyer or Adjust with ATT-prompt timing designed to maximise opt-in rate before ATT is shown (not the first screen the user sees).

Three-layer testing: Jest for pure JS business logic and hook testing with react-native-testing-library for component unit tests (fast, no device required); Detox for end-to-end flows on simulators and real devices (covers navigation, form submission, deep link handling, and permission dialogs); and EAS Build cloud builds run against the Expo / React Native device matrix for real-device crash detection. Detox tests run in CI on every PR. For regulated industries (HealthTech, FinTech) we add a security pass: OWASP MSTG checks for data-at-rest encryption, certificate pinning verification, and network traffic analysis via Proxyman.

Default stack in 2026: Zustand for global UI state (lightweight, no boilerplate), TanStack Query (React Query) for server state with automatic caching, revalidation, and optimistic updates, and MMKV or SQLite (op-sqlite) for persisted offline state. Redux Toolkit is used on existing codebases where a migration would exceed the benefit. Context API is fine for low-frequency global values (theme, user session) but not for high-frequency state that causes full-tree re-renders. We avoid prop drilling past two levels and use Zustand slices to keep domain logic isolated. The state architecture is documented and reviewed in the discovery phase, not decided during sprint 2.

Yes, that is the primary value proposition. One JavaScript and TypeScript codebase produces an iOS IPA and an Android APK/AAB, both submitted from the same repo. EAS Build handles the native build process, code signing (Fastlane Match or EAS Credentials for iOS, Keystore for Android), and can submit directly to App Store Connect and Google Play via EAS Submit. The main per-platform work is in native module bridging, permission handling (iOS purpose strings vs Android permissions manifest), and store-specific UI conventions (Human Interface Guidelines vs Material 3). We test on both platforms every sprint to catch platform divergence early, not at submission time.

Payment processing: Stripe React Native SDK, Adyen Drop-In, Apple Pay and Google Pay via react-native-payments. Maps and location: react-native-maps (Google Maps / Apple Maps), Mapbox GL, react-native-background-geolocation. Auth: react-native-app-auth (OAuth 2.0 / OIDC), Sign in with Apple, Google Sign-In, Firebase Auth. Analytics: Firebase Analytics, Amplitude, Mixpanel, AppsFlyer. Real-time: WebSocket clients, Socket.io, and Pusher for live data flows. Media: react-native-video, ExoPlayer bridge (Android), AVPlayer bridge (iOS), expo-image-picker, react-native-camera. Enterprise: Salesforce Mobile SDK, SAP BTP, Microsoft Authentication Library (MSAL).

With the New Architecture (Fabric + TurboModules + Bridgeless, default since RN 0.76), the synchronous bridge that was the main source of JS-thread jank is replaced with JSI — native calls from JS are direct and synchronous where needed. For animations and gestures we use react-native-reanimated (worklets that run on the UI thread, never cross the bridge) and react-native-gesture-handler (recognisers on the native side). Heavy computation (image processing, cryptography, large JSON transforms) moves to a worklet or a native module. FlatList virtualization, React.memo, and useMemo/useCallback are applied at the component level. We profile with Flipper, Reactotron, and the React DevTools Profiler, and gate every PR on a Detox performance benchmark on a mid-range Android device.