01
New React Native apps and MVPs
Launch on iOS and Android together from one codebase, test with real users, then grow the app without a rewrite.
FIG 01 · React Native App Development
React Native app development company for iOS and Android
One TypeScript codebase, real native UI on both platforms. New apps with Expo, upgrades to the New Architecture, AI features and a store launch handled for you.
See how it works
FIG 02 · Quick answer
What does a React Native development company do?
A React Native development company builds iOS and Android apps from one JavaScript or TypeScript codebase that renders real native UI. Elgrith designs and builds React Native apps with Expo, upgrades older apps to the New Architecture, adds AI features and native modules where needed, and handles App Store and Google Play release and support.
- TypeScript codebase for iOS and Android
- 1
- Projects delivered since 2015
- 1,000+
- Clients across the USA, UK and India
- 250+
- Your code, data and admin access
- 100%
FIG 03 · Why it matters
Why React Native in 2026.
From React Native’s own release notes and showcase. The architecture that used to hold it back is gone.
01
0.76
New Architecture on by default
Starting from React Native 0.76, the New Architecture is enabled by default in new projects.
Source: reactnative.dev, React Native 0.76(opens in a new tab)02
0.82
The only architecture from here
From React Native 0.82, the New Architecture is the only architecture for that and future versions. Older apps need an upgrade path.
Source: reactnative.dev, React Native 0.82(opens in a new tab)03
Shopify
Builds all its mobile apps in React Native
React Native’s showcase says all mobile apps at Shopify are built using React Native.
Source: reactnative.dev showcase(opens in a new tab)
FIG 04 · Honest fit
When React Native is the right choice, and when it isn’t
React Native renders real native components from one TypeScript codebase. It is a strong default for most business and consumer apps. Here is where it shines, and where we would recommend something else.
| React Native is a strong fit | Consider something else | |
|---|---|---|
| Team | Teams that know React and TypeScript, or want web and mobile in one language | Separate iOS and Android teams you already run well |
| UI | Platform-native components that feel at home on each OS | A pixel-identical custom UI everywhere (Flutter draws its own) |
| Device features | Camera, maps, payments, push, Bluetooth through libraries or native modules | Apps built almost entirely on the newest native SDKs |
| Graphics | Business, commerce, social and content apps | Heavy 3D, games or real-time video processing |
| Code sharing | Logic and types shared with a React or Next.js web app | No web product, and no plans for one |
When React Native isn’t the right tool, we’ll say so and build in Flutter or native Swift and Kotlin instead.
Compare: Flutter app developmentFIG 05 · What you get
React Native app development services
From first prototype to store release and beyond: one TypeScript team for your iOS app, your Android app and, if you need it, your web app.
02
Upgrades to the New Architecture
Older apps moved to Fabric, TurboModules and JSI, with libraries updated and native code checked, release by release.
03
Migrating native or hybrid apps to React Native
Cordova, Ionic or separate native apps moved to React Native screen by screen, or added inside your existing native app.
04
Native modules (Swift and Kotlin)
When a library doesn’t exist or isn’t good enough, we write Swift and Kotlin modules with typed interfaces to your JavaScript.
05
AI features in React Native apps
Chat assistants, smart search, image and voice features, built on models from OpenAI, Anthropic and Google, with costs kept in check.
06
App Store and Google Play release, OTA updates
Store listings, review and release, plus over-the-air updates with EAS Update for fixes that don’t need a full store review.
Deliverables
12
deliverables, in writing
Included in every build, written into your fixed quote before work starts.
FIG 06 · Flagship build
Proof: AI products, engineered end to end
Kenerate AI is a web product, not a React Native app. It’s our flagship build, an all-in-one AI image and video studio we designed and engineered, and it shows the AI-integration depth we bring to your app.
- 200+ AI models behind one app, one login and one credit balance
- 23+ studios and tools, from Image Studio to Director
- Kenerate Agent: chat with an agent that picks the model and runs the workflow
- 1,000+ projects for 250+ clients since 2015
The idea: 15 apps, 15 logins, 15 bills become one studioDesigned and engineered by Elgrith
- AI models in one app
- 200+
- Studios and tools
- 23+
- Maximum output
- 4K
- Guides
- 500+
FIG 07 · Under the hood
How we build React Native apps that last
The technical choices that decide whether a React Native app stays fast and easy to change after version one.
06principles
New Architecture and Hermes
Fabric, TurboModules and the Hermes engine on every new app, with libraries checked for compatibility before we pick them.
TypeScript end to end
Typed screens, API clients and navigation, so the codebase stays safe to change as it grows.
Over-the-air updates
EAS Update for JavaScript fixes between store releases, with staged rollouts and a way back.
Tests and CI/CD
Unit and end-to-end tests, with EAS Build, fastlane or GitHub Actions shipping test builds automatically.
Performance on real devices
Startup time, frame rate and memory profiled on low-end Android phones as well as new iPhones.
Accessible by default
Accessibility labels, scalable text, contrast and screen reader checks on VoiceOver and TalkBack.
FIG 08 · Go further
The rest of your product, from one team
Your app rarely lives alone. These are the services that most often sit next to it.
06principles
React and Next.js web
Your web app in React and Next.js, sharing types, logic and design tokens with the mobile app.
React & Next.js developmentStart with an MVP
Prove the idea with a lean first version before you fund the full roadmap.
MVP developmentAI features
Assistants, search and generation features planned and built with your app.
AI developmentReact Native or native?
Speed, cost and hiring compared, for teams weighing one codebase against two.
React Native vs native in 2026Plan your budget
What drives the cost of an app in the UK, from features to platforms to back end.
App development cost in the UK
FIG 09 · Measurement
How we measure app quality
Every release is checked against the same scorecard, so performance problems are caught before your users find them.
| Metric | What it tells you | How we measure it |
|---|---|---|
| Startup time | How long users wait before the app is usable | Cold-start timing on real low-end and high-end devices |
| Crash-free sessions | How often the app crashes | Sentry or Firebase Crashlytics, per release |
| Frame rate | Whether scrolling and animations feel smooth | Profiling on device, screen by screen |
| App size | Download size and install friction | Store build size tracked per release |
| Store rating | What users think | App Store and Google Play reviews, read and acted on |
Targets are agreed with you during discovery. We don’t quote benchmark numbers before we have seen your app and users.
FIG 10 · Process · 6 steps
Test builds on your phone, every sprint
A fixed written quote and a phased plan before work starts. You hold a working build in your hand from the first sprint, not just at the end.
- Step 01
Discovery
Users, features, platforms, integrations and risks. You get a written scope, a phased plan and a fixed quote.
- Step 02
UX and UI
User flows and screens for iOS and Android in Figma, tested as a clickable prototype before development starts.
- Step 03
Sprints with test builds
Development in sprints, with new builds on TestFlight and Google Play internal testing so you try every feature on your own phone.
- Step 04
QA on real devices
Manual and automated testing across iOS and Android phones and tablets, screen sizes and OS versions.
- Step 05
Release
Listings, screenshots, privacy details and submission to the App Store and Google Play, under developer accounts in your company’s name.
- Step 06
Support
Monitoring, crash fixes, OS and React Native upgrades, over-the-air updates and new features, on a plan agreed in writing.
FIG 11 · What you get
Everything included
Written into your fixed quote, so you know exactly what you are paying for before work starts.
12items
- Discovery notes and feature map
- Written scope and fixed quote
- UX flows and Figma UI designs
- React Native app for iOS and Android
- Native modules, where needed
- Back end and API set-up
- Unit and end-to-end tests
- CI/CD for test and store builds
- Crash reporting and analytics
- Over-the-air update setup
- Store listings and submission
- Full source code and store accounts in your name
FIG 12 · Tech & tools
The tools behind the work
Proven, well-supported tools, chosen for your project and set up in accounts your business owns.
- React Native
- TypeScript
- Expo
- EAS Build
- EAS Update
- Hermes
- React Navigation
- Expo Router
- Swift
- Kotlin
- Firebase
- Supabase
- Node.js
- Stripe
- RevenueCat
- OpenAI
- Sentry
- fastlane
- GitHub Actions
FIG 13 · Who it’s for
React Native apps for every stage.
From a first version to an app that has fallen behind.
3 audiences
New app
Your first iOS and Android app.
An MVP on both platforms from one codebase, with Expo, analytics and a store launch handled for you.
- Clickable prototype first
- Test builds every sprint
- Store accounts in your name
- Room to grow without a rewrite
Upgrade
An older app that needs to catch up.
An audit, then an upgrade to the New Architecture, current libraries and current store requirements, without stopping releases.
- Upgrade audit and plan
- Library and native code updates
- Regression testing on devices
- Releases continue during the work
React teams
Web teams going mobile.
Bring your React and TypeScript skills to iOS and Android, sharing types, logic and design tokens with your web app.
- Shared TypeScript packages
- Monorepo set-up
- One design system for web and mobile
- Coaching for your developers
FIG 14 · Working with us from the USA and UK
Built in New Delhi. Run on your hours.
Every project gets a point of contact in New York or London and an engineering team in New Delhi. Here is how today’s working days line up, live.
New York
North America
--:--ET
New Delhi team Your working day- Shared working time
- ≈ 3 hours today
- New Delhi is
- 10.5 h ahead
- Live calls, your time
- 9 a.m. to 12 p.m. ET
London
UK & Europe
--:--UK
New Delhi team Your working day- Shared working time
- ≈ 4.5 hours today
- New Delhi is
- 5.5 h ahead
- Live calls, your time
- 9 a.m. to 1:30 p.m. UK
Three ways to work together
- 01
Fixed-scope project
A written scope, one fixed price and a dated plan. Suits websites, apps and MVPs.
- 02
Dedicated team
Designers and engineers on your roadmap every month, billed monthly.
- 03
White label
For US and UK agencies: our work, your brand, unbranded deliverables.
Every engagement
- Fixed quote in USD, GBP or INR after a free 30-minute call
- NDA before discovery. You own all code, designs and content
- A working demo every sprint, not status slides
- Reply within one business day, calls inside your hours
Book a call
Calls on ET or UK hours
FIG 15 · Compare
React Native vs Flutter vs native
All three can ship a great app. The right choice depends on your team, your design and how much of each platform’s native SDK you need.
| React Native | Flutter | Native (Swift and Kotlin) | |
|---|---|---|---|
| Language | JavaScript and TypeScript | Dart | Swift for iOS, Kotlin for Android |
| Codebases | One | One | Two |
| UI | Real native components through React | Drawn by Flutter: identical on every platform | Fully native per platform |
| Web code sharing | Logic and types with React and Next.js | Flutter web, best for app-like tools | Separate projects |
| Hiring pool | Large (JavaScript and React) | Smaller (Dart) | Separate iOS and Android specialists |
| Best for | Teams strong in React, apps with a web sibling | Custom, branded UI on iOS and Android together | Apps that live on the newest native APIs |
FIG 16 · Expo or bare?
Expo or bare React Native?
React Native’s own docs recommend starting new apps with a framework such as Expo, and Expo no longer limits native code. Here is how we choose.
| Expo (with EAS) | Bare React Native | |
|---|---|---|
| Best for | Most new apps | Apps with unusual native build needs or an existing native setup |
| Native code | Yes, through config plugins and custom native modules | Full manual control of the iOS and Android projects |
| Builds | EAS Build in the cloud, or locally | Xcode, Gradle and your own CI |
| Updates | EAS Update for over-the-air fixes | Your own OTA setup, or store releases only |
| Upgrades | Smoother: SDK releases bundle tested versions | More manual work on each upgrade |
FAQ
Frequently asked questions
Straight answers about React Native App Development with Elgrith.
Yes. React Native builds iOS and Android apps from one JavaScript or TypeScript codebase and renders real native components on each platform. Most screens and logic are shared, and platform-specific code is added only where iOS and Android genuinely differ.
FIG 17 · Related
Keep exploring
App Development
iOS, Android & cross-platformFlutter App Development
One codebase for iOS & AndroidReact & Next.js Development
Fast React and Next.js front endsMVP Development
Web, mobile and AI MVPs you ownApp development, London
iOS, Android & Flutter apps on UK timeApp development, New York
iOS, Android & AI apps on Eastern Time
Free 30-minute call
One codebase. Both stores. Let’s build it.
Tell us about your app. After a free call you get a written scope, a phased plan and a fixed quote, and you own the code and the store accounts.
Pick a day for your call
OpenPick a day. You'll choose a time in your own time zone on the next step.