/React Native agency
iOS and Android apps from one React Native codebase, built by a studio that ships its own app.
Ecrin Digital is an independent design and engineering studio in France, founded in 2023 by Alexis Chân Gridel, a member of the Awwwards Young Jury 2026. We design and build iOS and Android apps in React Native and Expo, from scoping to App Store and Google Play release, for startups and businesses, with the code delivered to your own repository.
(React Native, Expo, TypeScript) (iOS and Android) (Store release included) (Quoted after scoping)
(Why React Native)
(01)
A single TypeScript codebase serves iOS and Android, which roughly halves build and maintenance effort compared with two native apps.
(02)
Performance-critical parts can be written natively and exposed to React Native. In Doodraw, the drawing engine is native while the interface is React Native.
(03)
Cloud builds, store submission and over-the-air updates let us fix a bug in production without waiting for a store review when the change allows it.
(04)
Types, logic and people are shared with a React or Next.js website and dashboard, so your product stays consistent across platforms.
(What we build)
(01)
Polished interfaces, gestures and animations that feel native on both platforms, designed with the same care as our websites.
(02)
A scoped first version with accounts, the core feature and analytics, released to both stores so you can learn from real users.
(03)
In-app purchases and subscriptions on iOS and Android, paywalls, and card payments where the store rules allow them.
(04)
Push notifications, local storage and sync so the app keeps working on a weak connection.
(05)
Camera, location, sensors, or a custom native engine when JavaScript is not fast enough.
(06)
Signing, TestFlight and Google Play testing, listings and review notes, then OS updates and new releases after launch.
(Proof)
/Our own app
An animated drawing app where every stroke moves the moment it is drawn. Co-founded by Alexis Chân Gridel and Élodie Mayade and built end to end by the studio: a React Native and Expo interface on top of a native rendering engine, with subscriptions and over-the-air updates. Available on iPhone, iPad, Android and Windows.
(86,000+ installs) (iOS, Android, Windows) (React Native, Expo, native engine)
/Client app
A client iPhone app, now live on the App Store. We joined before launch for development support: fixes and features from TestFlight feedback, through to the public release.
(Live on the App Store) (iPhone) (Development support)
(Stack)
(Process)
A short call to define the first version, the platforms and the integrations. A written scope and a fixed quote follow.
Key screens and interactions, tested on a real phone early, not only in mockups.
Weekly test builds you install on your own phone through TestFlight and Google Play testing.
Listings, screenshots, privacy forms and review notes, then submission until both apps are live under your developer accounts.
Crash monitoring, OS updates, new features and releases on an optional monthly retainer.
(Pricing)
Every app is different, so we price it after a short scoping call. These are the same tiers as the rest of the studio.
(01) Small projects
From €500
A screen or a flow rebuilt in your existing React Native code, a store submission, a performance fix.
(02) Launch Sprint
€6,000 to €20,000
A scoped app or a focused product surface, designed, built and released, delivered in your repository.
(03) Engineering Retainer
€3,000 a month
Ongoing development and maintenance after launch: new features, OS updates and store releases.
(React Native, native or no-code?)
| React Native with Expo | Two native apps | No-code app builder | |
|---|---|---|---|
| Codebases | One for iOS and Android | Two | One, inside the platform |
| Native feel and performance | Native UI, native modules when needed | Best | Limited |
| Cost to build and maintain | Moderate | Highest | Low at first, then fees |
| Code ownership | Your repository | Your repository | Locked in the platform |
| Updates | Store releases and over-the-air fixes | Store releases only | Depends on the platform |
(FAQ)
Ecrin Digital is an independent studio founded in 2023 by Alexis Chân Gridel, member of the Awwwards Young Jury 2026. We design and build iOS and Android apps in React Native and Expo, fully remote from France, and we ship our own app, Doodraw, with more than 86,000 installs.
Small projects start at €500. A scoped app usually fits a Launch Sprint, from €6,000 to €20,000 excluding VAT, and ongoing work runs on a €3,000 monthly retainer. We give a fixed quote after a short scoping call.
A focused first version typically takes 6 to 12 weeks from scoping to store release, depending on scope and integrations. You can install a test build on your phone within the first weeks.
Both build good cross-platform apps. We choose React Native because it shares TypeScript, logic and developers with React and Next.js websites, which keeps your whole product on one stack.
Yes. React Native renders real native components, and we write performance-critical parts natively when needed, as with the drawing engine in Doodraw.
Yes. We prepare signing, listings and review notes, run TestFlight and Google Play testing, and submit until both apps are live under your own developer accounts.
Yes. We start with an audit of the code, dependencies and crash reports, then fix, upgrade the Expo SDK and ship new features step by step.
Tell us what you want to build. We reply within 24 hours and send a written scope and a fixed price after a short call.