Cross-Platform Apps
One shared codebase across iOS, Android and the web — without the usual cross-platform compromises.
What this service covers
Cross-platform doesn't have to mean lowest-common-denominator. We build React Native + Expo apps that share 90%+ of the codebase between iOS and Android, layer in native modules where it matters, and ship a synchronised web experience using the same component library.
Our cross-platform builds use disciplined TypeScript, server-driven UI where it fits, and OTA updates via EAS Update — so you can push fixes the same day you find them.
The shape of the engagement
Four things every project under this service is built around.
One codebase, three surfaces
iOS, Android and web from a shared design system, with platform-specific affordances where users expect them.
OTA updates
Push JS and asset updates over-the-air via EAS Update without going through store review.
Native modules when needed
Camera, Bluetooth, biometrics, payments — we drop into Swift / Kotlin for performance-critical pieces.
Tested on real devices
Detox, Maestro and BrowserStack against the device matrix you actually care about — not just simulators.
What we build it with
Senior teams, modern tooling — no experiments at your expense.
Framework
- React Native
- Expo
- TypeScript
- Reanimated 3
State & Data
- TanStack Query
- Zustand
- MMKV
- WatermelonDB
Tooling
- EAS Build
- EAS Update
- Fastlane
- Detox
- Sentry
A predictable delivery playbook
Same four phases on every project — adapted to your scope, not improvised.
Platform strategy
We map which screens are shared vs platform-specific, and decide where native modules give a real ROI.
Shared foundations
Design tokens, navigation, auth, theming and offline sync set up once — and reused across platforms.
Build & verify
Parallel iOS + Android sprints with continuous device testing and weekly stakeholder demos.
Ship & iterate
Phased rollout, OTA fixes, store rollouts and crash-rate-driven hotfixes after launch.
What changes for your business
- Cut mobile development cost by 40–60% versus building two separate native apps.
- Maintain 60fps animations and sub-2-second startup on mid-tier Android devices.
- Push critical fixes to all users within hours via EAS OTA updates.
- Reuse 70%+ of business logic between mobile and a web companion app.
Common questions
If yours isn't here, ask us directly — we reply within one business day.
Is React Native production-ready for fintech / health?
Yes. Discord, Coinbase, Microsoft Teams and Shopify all run on RN. We handle compliance, biometrics and secure storage as standard.
Can you reuse the same code for a web app?
Often, yes — using React Native for Web or a shared React component layer. We scope this honestly during discovery.
How do you handle native dependencies?
We use Expo dev clients with config plugins, or eject to bare workflow when needed. Either way, builds stay reproducible.
What about app size?
We aggressively tree-shake, lazy-load and prune dependencies — most of our RN builds ship under 25MB on Android.
Often paired with
Most of our engagements combine two or three of these — here are the closest fits.
Ready to talk about cross-platform apps?
Tell us what you're building — we'll come back with a scoped proposal in under 48 hours.