React Native Development Agency
Codixus is a product studio shipping cross-platform iOS and Android apps in React Native and Expo. End-to-end build, App Store submission, subscription billing, growth. Starter from $2,749.
One opinionated stack covering the mobile layer, backend, subscriptions, push, AI features, and product analytics. Our own apps run in production on the same stack we will build yours on, so you get the patterns, not the surprises on cloud builds, native modules, App Store review, and the new architecture.
What we ship
A React Native engagement from Codixus is a complete production app, not a prototype. Cross-platform code, real native modules where they matter, and the full operational stack underneath.
React Native + Expo
Single TypeScript codebase shipping to iOS and Android. Expo SDK for camera, notifications, in-app purchase, file system. EAS Build and EAS Update for cloud signing and OTA patches.
Native modules
Swift on iOS, Kotlin on Android, when an SDK lacks a React Native wrapper. Share extensions, custom camera pipelines, deep platform integrations. We do not fake native with web views.
Backend + auth
Bun runtime on the API layer, Supabase for Postgres, auth, storage, realtime. Or we plug into your existing backend. Edge-deployed where latency matters.
Subscriptions
RevenueCat handling App Store and Play Store in-app purchases, receipt validation, entitlements, and revenue analytics. Paywall placement and price experiments included.
Push + lifecycle
OneSignal for push notifications and lifecycle messaging. Timezone-aware sends, segment targeting, and re-engagement campaigns that move retention metrics, not vanity opens.
AI features
Anthropic Claude and OpenAI wired in through a server-side proxy. Streaming responses, tool calls, structured output. AI-native architecture from day one when the product needs it.
Analytics + ASO
Litemetrics for product analytics, App Store Connect ASO setup with iterating keywords and screenshots, Google Search Console for organic discovery on the marketing site.
CI/CD + observability
EAS for builds and signing, GitHub Actions for tests and lint, Sentry for crash reporting, structured logs for the backend. The boring infrastructure that keeps a shipped app shipped.
Why founders choose Codixus as their React Native agency
Own-brand apps in production
CurtainAI, FiberCheck, PromptJr, OKNOK, PassThePhone, Bluffin, BeJudge, and Flast are all live on the App Store and Google Play, all React Native, all shipped by us. We do not learn React Native on your budget.
End-to-end studio, not a body shop
Design, engineering, App Store submission, ASO, push, and post-launch operate live under one accountable team. No hand-offs to a separate growth agency or an outsourced ASO consultant.
AI-native when the product needs it
Half of our portfolio uses Anthropic Claude and OpenAI in the core flow. We bring the architecture patterns, streaming UX, and cost guardrails that AI-native apps need on day one.
Transparent fixed-scope pricing
Starter from $2,749. Pro and Enterprise tiers published publicly. No hourly billing surprises, no scope creep invoiced quietly. Budget locked before code is written.
Our React Native delivery approach
Discovery
One-week sprint to lock the core flows, the platforms, the monetization, and the metric that matters. Output is a fixed scope.
Design + build
Three to six weeks of design and React Native engineering in parallel. Weekly TestFlight and internal Play track builds.
Launch + ASO
App Store and Play Store submission, screenshots, keywords, reviewer notes, and the first ASO iteration tuned against early install data.
Operate + iterate
Three months of free post-launch consultancy. Bug fixes, paywall experiments, push campaigns, and retention engineering.
Featured React Native work
Three of the React Native apps Codixus designed, built, launched, and operates today.
CurtainAI
AI curtain visualizer for homeowners and interior designers. React Native + Expo + RevenueCat + Anthropic Claude. Live on iOS and Android in production.
PromptJr
AI learning companion for kids 6 to 14. React Native with custom kid-safe UI primitives, parental controls, age gating, in-app purchase paywall on lesson four.
FiberCheck
AI fabric safety scanner for parents. React Native camera pipeline feeding a vision model with weekly subscription paywall. Live on iOS and Android.
Transparent React Native pricing
Starter projects begin at $2,749 and cover a focused cross-platform MVP with auth, subscription, push, and analytics. Pro and Enterprise tiers scale up scope, native modules, and team size. Every quote is fixed-scope, not open-ended hourly billing.
See full pricing →React Native development FAQ
Is React Native the right choice for your app?
Usually, but not always, and we will tell you when it is not. React Native wins when you want one codebase on both stores, your team already thinks in TypeScript, and the app is mostly screens, data, and business logic. That covers subscription products, AI assistants, marketplaces, and most consumer apps we build. If you are weighing the alternatives, we wrote up an honest comparison in React Native vs Flutter, including the cases where Flutter or fully native is the better call.
Budget is the other half of the decision. A single React Native codebase typically lands 25 to 40 percent below the cost of two native builds, and our app development cost breakdown shows exactly where that money goes at each scope level.
The fastest way to sanity-check the fit is to look at apps we have already shipped on this exact stack. Every one of them started with the same question you are asking now.