React Native (JS/TypeScript) development
Built in TypeScript where possible for type safety across a growing codebase.
React Native App Development
React Native App Development, Sharing Code With Your Web App
We build React Native apps in JavaScript or TypeScript, and where you already have a React web app, we look for genuine opportunities to share business logic rather than duplicating it.
React Native apps that duplicate logic already built for the web
Teams with an existing React web app often rebuild business logic from scratch for the mobile app, missing a real opportunity to share code and reduce long-term maintenance.
- Business logic (validation, API calls, calculations) duplicated separately for web and mobile
- Native modules bridged inconsistently, leading to crashes on specific devices
- Bundle size growing unmanaged as dependencies are added without review
- No clear upgrade path as React Native and its dependencies release new versions
Deliberate code-sharing, not just 'it's also JavaScript'
Where you have an existing React web app, we assess what logic (API layers, validation, state management) can genuinely be shared as packages between web and mobile, and build the React Native app with a clear dependency and upgrade strategy so it doesn't become brittle over time.
What's included
Service components
Code-sharing assessment & setup
Identifying and structuring shared logic packages between an existing React web app and the new mobile app.
Native module integration
Camera, biometrics, push notifications and other native capabilities via well-maintained native modules.
State management & API layer
Consistent state management and API integration patterns, shared with the web codebase where applicable.
Bundle size & dependency management
Reviewing dependencies to avoid unnecessary bundle bloat.
Store submission for both platforms
Preparing and submitting Android and iOS builds from the shared codebase.
Process
How we deliver it
- Step 01
Requirements & code-sharing assessment
Reviewing your existing web codebase (if any) to identify genuinely shareable logic.
- Step 02
Architecture & dependency planning
Setting up shared packages and choosing a stable, well-maintained dependency set.
- Step 03
Development
Building screens and native integrations in React Native, with TypeScript where suited.
- Step 04
QA across platforms
Testing on Android and iOS devices, since native module behaviour can still differ by platform.
Outcomes
What you get out of it
Reduced duplicate logic
Genuine code-sharing with an existing React web app cuts long-term maintenance work.
Faster feature development
Shared logic and a large React ecosystem speed up common feature implementation.
Type-safe codebase
TypeScript reduces a class of runtime bugs as the app scales.
Managed dependency risk
Careful dependency selection avoids relying on abandoned or unstable packages.
Why D2S
Why teams choose us for this
- We assess actual code-sharing opportunities with your existing web app, not just claim it's possible
- TypeScript used where it improves long-term maintainability
- Dependencies reviewed for maintenance status before being added to the project
- Testing performed separately on Android and iOS, not assumed identical because the code is shared
Industries
Sectors we work with
SaaS & B2B techE-commerce & D2CFintechMedia & contentLogisticsMarketplaces
FAQ
Frequently asked questions
01Can React Native really share code with our existing React web app?
Some of it — typically business logic, validation and API layers — can be shared as packages; UI components generally can't be shared directly since web and native rendering differ. We assess this case by case.
02Why choose React Native over Flutter?
React Native suits teams with existing JavaScript/React expertise or an existing React web app to share logic with; the right choice depends on your team and codebase, which we cover on our cross-platform strategy page.
03Do you use TypeScript for React Native projects?
Yes, by default where the project and team benefit from the added type safety.
04How do you handle native features like push notifications?
Through well-maintained native modules, integrated and tested on both Android and iOS devices.
05Do you maintain React Native apps after launch?
Yes, including React Native and dependency upgrades, which need regular attention given how quickly the ecosystem moves.
Keep exploring
Related services
Already have a React web app and considering React Native?
Tell us about your existing codebase and we'll assess what can genuinely be shared.