One codebase, two platforms
A single React Native and TypeScript codebase ships to both the App Store and Google Play, so you launch on iOS and Android together instead of building the same app twice.
Built with React Native
Cross-platform apps KUMO ships with React Native.
Production iOS and Android apps from one React Native codebase, built by a senior team for founders and operators who have been told "React Native" and need it shipped, released to both stores, and supported. Milestone-based delivery. Full IP transfer.
4.9Clutch
5.0Google
AWSPartner
iOS + AndroidApp Store + Play
Reviewed 3 August 2026
When React Native fits
When React Native is the right call.
React Native fits when you want iOS and Android from one codebase and a fast route to a live product. When a product needs maximum performance or deep platform-specific hardware, native is the better path, and KUMO builds native too. The choice follows the workflow, not the trend.
Faster to a live product
Shared business logic across platforms, with native modules dropped in where a feature needs them. Flickd went from start to a launched iOS and Android app in three months.
When native is the better path
For performance-critical graphics, heavy device hardware, or AR, native (Swift or Kotlin) is the right call, and KUMO builds native too. We evaluate Flutter the same way. The choice follows the product, not fashion.
What we build
What a React Native build includes.
Cross-platform app
A production React Native and TypeScript app for iOS and Android, built end to end from one codebase.
App Store + Play release
Submission, review handling, TestFlight beta, and staged rollout across the App Store and Google Play.
Backend and API
Node and Postgres services, third-party integrations, and AWS deployment where the build calls for it.
Device and QA matrix
A device and OS coverage matrix, automated and manual testing, so releases hold up on real phones.
Post-launch support
Crash and performance monitoring, ongoing updates, and operability after launch, not a hand-off-and-leave.
Proof
React Native apps KUMO has shipped.
Flickd
Full React Native app, built end to end
KUMO built the full React Native app for iOS and Android end to end in three months: an AI recommendation engine, watchlist tracking, streaming-availability alerts, and community features. Launched on Product Hunt. Clutch lists the project in the $10K to $49K band.
Read the Flickd case study →Gluf
React Native front end, built and published
KUMO built and published the React Native app front end; the back end was owned by the client. Gluf scores restaurants on cross-contamination risk for the gluten-free community, and was shortlisted for Startup for Good 2026.
Read the Gluf case study →KUMO has also built and shipped React Native apps for Kaft (AI news-podcast), FLIN (fintech for Indonesian and Philippine markets), SweatScore (health and fitness), and Nuancers. See all React Native case studies →
How this gets built
The engineering behind the app.
- Stack: React Native and TypeScript, with Node and Postgres on the backend and AWS where the build calls for it.
- CI/CD pipelines for both stores, so builds and releases are repeatable.
- A device and OS QA matrix, automated and manual, run before every release.
- Release management across the App Store, Google Play, and TestFlight, with staged rollout.
- Crash and performance monitoring, and a rollback path when a release misbehaves.
- A documented handover and full client IP ownership from milestone payment.
Your options
React Native vs the alternatives.
| Choice | Codebase | When it wins |
|---|---|---|
| React Native (KUMO) | One codebase, iOS and Android | You want both stores fast, with shared logic and native modules where needed |
| Native (Swift / Kotlin) | One codebase per platform | Performance-critical graphics, deep platform hardware, or AR. KUMO builds native too |
| Flutter | One codebase, iOS and Android | A valid cross-platform alternative. KUMO evaluates it per product |
| In-house hiring | $250K+/yr per senior + hiring lag | You already have 2+ senior mobile engineers with headroom |
Investment
What a React Native build costs.
The same two-tier engagement model as every KUMO build. Final scope and quote come after a discovery call, once we understand the app and its backend.
Starter Build
$20K to $50K
Your first React Native build, end to end. 4 to 16 weeks. Final scope and quote after the discovery call.
Grow Build
$50K to $100K
A larger cross-platform product with backend, integrations, and release pipeline. 16 to 24 weeks. Final quote after technical discovery.
Common questions
Common questions.
Should I build in React Native or native? +
React Native when you want iOS and Android from one codebase and speed to a live product. Native (Swift or Kotlin) when the product needs maximum performance, deep platform-specific hardware, or AR. KUMO builds both and picks per product, not per fashion.
Do you release to the App Store and Google Play? +
Yes. We handle submission, review responses, TestFlight for beta, and staged rollout on both stores. Flickd shipped on iOS and Android and launched on Product Hunt.
Who owns the code? +
You do. Full IP transfer on milestone payment: source code, CI/CD configuration, and documentation. No lock-in, no license-locked components.
What does a React Native app cost? +
A Starter Build runs $20K to $50K over 4 to 16 weeks. A Grow Build runs $50K to $100K over 16 to 24 weeks. Final scope and quote come after the discovery call.
Can you take over an existing React Native app? +
Yes. We audit the codebase, stabilise the build and release pipeline, and pick up delivery, with a documented handover at the end.
Building a React Native app?
30 minutes, no pitch deck. You describe the app, we tell you honestly whether React Native is the right call and roughly what it would cost.