React Native · TypeScript · Hermes

One Codebase, Two Native Apps

Most teams end up maintaining the same product twice — once in Swift, once in Kotlin, forever. React Native lets your team write the app once in TypeScript and run it on both platforms with real native views underneath. You get one roadmap, one codebase, and one team to hold, with native code added only where a platform demands it.

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TypeScript First
70 to 90% Shared Code
Both Store Releases
dotanpix-mobile / mobile-stack.config
React Native TypeScript Hermes React Navigation Reanimated Gesture Handler TurboModules Fastlane
The Shared Core

What One Codebase Actually Buys You

React Native is a real engineering trade, not a shortcut. These are the numbers that decide whether it fits your product.

build-report / shared-surface.json
01
70–90%
Of screens, state, and business logic written once for both platforms
02
60fps
Animation budget held by Reanimated on the native UI thread
03
2x
Typical sprint output against maintaining two native codebases
04
1 team
One squad covering iOS, Android, and both release pipelines
Cross-platform mobile build running on iOS and Android from a single codebase
Shared Code

Write the Logic Once, Ship It Everywhere

A React Native screen is a real component, not a web page in a wrapper. It renders native views, follows platform accessibility settings, and behaves like any other app on the device. Your team writes the interface, the data layer, and the business rules in one place, and the same code compiles into an iOS binary and an Android APK.

  • Business logic, types, and API clients written once in TypeScript
  • Validation and formatting rules shared with your web build where it pays off
  • Navigation, caching, and error states kept consistent across both platforms
  • Typed CI checks and review standards applied to every pull request
screens/BookingScreen.tsxios + android
// one file, two stores import { useQuery } from '@tanstack/react-query'; import { getSlots } from '../api/slots'; export default function Booking() { const { data } = useQuery({ queryKey: ['slots'], queryFn: getSlots, }); return <SlotList data={data} />; }
Developer working on a mobile app codebase on a laptop
Native Escape Hatches

JavaScript Where It Works, Swift and Kotlin Where It Matters

Nobody sensible runs a bank on a JavaScript framework alone, and we do not pretend otherwise. When a feature has no JavaScript equivalent — a custom camera pipeline, Bluetooth peripherals, background location, health data, keychain storage — we write a small native module and expose it to the app through the bridge. You keep the shared codebase and drop native code into the handful of places that earn it.

  • Camera, Bluetooth, NFC, and location wrapped as small typed native modules
  • TurboModules and the New Architecture to skip the old async bridge entirely
  • Keychain and Keystore storage for tokens, with biometric login where it helps
  • Fastlane pipelines producing signed IPA and AAB builds from the same repository
What We Build

Six Ways We Ship React Native Products

From a first MVP to a product with real traffic, a real backend, and engineers who will inherit the code.

01

React Native App Builds

Production iOS and Android apps written in TypeScript, structured so your own team can pick the codebase up after handover.

02

Shared Code With Your Web App

Types, API clients, and validation rules moved into packages that the web build and the mobile app both import.

03

Reanimated & Gesture Interfaces

Sixty-frame motion, shared-element transitions, and swipe gestures that hold up on the budget Android hardware your users actually own.

04

Native Module Integrations

Swift and Kotlin modules for camera, Bluetooth, payments, health data, and anything else with no JavaScript equivalent.

05

Offline, Sync & Push

Local persistence, background sync, and notification handling that behaves the same way on both platforms, including on a bad connection.

06

App Store & Google Play Release

Signing, store listings, privacy labels, review replies, and staged rollouts handled end to end on both stores.

How We Work

From First Call to Both Store Listings

01 / setup

Architecture & Scope

We start by deciding whether React Native is the right tool, then map the screens, the data model, the API contracts, and exactly which parts will be shared code and which will be native. You get a written plan and a fixed quote before anyone opens an editor.

02 / setup

Project Skeleton

Monorepo, TypeScript strict mode, linting, CI builds, Fastlane signing, and the shared-versus-native module boundaries set up properly on day one. Skipping this is why so many React Native projects get expensive later.

03 / build

Two-Week Sprints

Short cycles with a working build at the end of each one, installed on a real device by you. No progress reports full of screenshots, no surprise integrations discovered in week nine.

04 / verify

Device QA & Profiling

Physical iOS and Android hardware, low-end Android included, with bundle size, startup time, memory, and crash rates checked against a budget we agreed in the architecture phase.

05 / release

Launch & Maintenance Plan

Both store submissions prepared, review replies handled, and a maintenance schedule agreed for React Native upgrades and dependency updates before the version you launch on goes stale.

Questions

React Native, Answered Plainly

React Native lets you write the app in JavaScript and TypeScript once and run that same code on iOS and Android. Screens, state, and business logic live in a single codebase, so a change ships to both platforms at once instead of being written and maintained twice. For most products — marketplaces, dashboards, booking apps, social tools, and internal enterprise software — that is the cheapest practical way to keep the two stores at feature parity.
TypeScript, unless you ask for something else. We enable strict mode, type navigation params, and type every API response from day one, so mistakes surface in review rather than on a device. The result is still readable as plain JavaScript, and we hand over documentation your own developers can pick up without a learning curve.
Often, yes. Types, validation rules, API clients, formatting helpers, and some state logic can move into a shared package that the web build and the mobile app both import. We deliberately keep platform rendering and native integrations inside the app, so the shared layer stays small and predictable instead of turning into a thicket of conditionals.
Yes, when it is set up properly. The interface renders real native views rather than a web view, and Hermes compiles JavaScript ahead of time so startup is quick and memory stays low. Animations run on the native thread through Reanimated and the New Architecture with Fabric and TurboModules, which removes the old asynchronous bridge bottleneck. We profile on low-end Android hardware, not only in the simulator.
Nothing dramatic. When a capability has no JavaScript equivalent — Bluetooth, NFC, a custom camera pipeline, background location, keychain storage, health data, or heavy audio work — we write a small native module in Swift or Kotlin and expose it to JavaScript through the bridge. The app stays mostly shared code, and native code appears only where the platform genuinely demands it.
It is the wrong choice when the product is a single-platform flagship built around heavy graphics or 3D rendering, when it must pair with custom Bluetooth hardware, when your team has no JavaScript experience and no budget for onboarding, or when the app is a thin wrapper around one simple endpoint. In those cases native Swift, native Kotlin, or Flutter is the better investment, and we will say so in the first call rather than after the deposit.
Yes, and it is one of our most common requests. We audit the repository first: dependency versions, TypeScript coverage, the upgrade path to the current React Native release, crash and performance data, and the condition of the native layer. You get a written assessment with a prioritized fix list, and we can run a short paid stabilization sprint before any new feature work starts.
React Native ships releases on a schedule, and falling behind compounds quickly. We track that cadence, upgrade in tested steps, keep dependencies current, and reserve time in every sprint for maintenance instead of treating it as an emergency. You also get crash reporting, store review replies, and over-the-air fixes for JavaScript-only changes so small corrections do not need a full store cycle.

Build Your React Native App With a Team That Ships

Tell us what you are building and we will map the React Native approach, the effort, and the honest timeline in a short, no-pressure call. If it is the wrong tool, we will tell you that too.

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