New app
From mock-up to release, with accounts, payments, notifications, chat and sync across devices.
React Native · Expo · iOS and Android
React Native developers for your iOS and Android apps
We have been building React Native apps for more than five years. One codebase for iOS and Android, released by us on the App Store and Google Play. We build apps from scratch and take over the ones another supplier left half-done.
Engagements
Build, take over or reinforce an app
We have worked on apps that add up to more than 8 million downloads, including iHoroscope and iVoyance, and built Memolines end to end. That volume teaches things a first project does not: version migrations, in-app purchases, store rejections, crashes that only happen on certain phones.
Taking over an existing app
Code audit, React Native and dependency upgrades, crash fixes before any new feature.
Migration to Expo
Cloud builds, over-the-air updates for fixes without a new store review, simpler native configuration.
Extra hands on a running project
We work in your repository, with your code reviews, on a defined scope. No full-time contractor placed in your office.
Remote, wherever you are
The first call is by video, or in Nice or Lille if you are nearby. For a takeover we ask for read access to the repository: an hour of reading tells us more than an hour of meetings.
Method
- 01
Reading
We read the existing code or the brief before quoting anything.
- 02
Scope
We set the version to deliver and what waits for a later one.
- 03
Development
Test builds on your phone at every stage, through TestFlight and Google Play.
- 04
Release
We follow store review, then crashes and reviews in the first weeks.
The code and accounts stay yours
Repository, Apple and Google accounts, signing keys: everything is in your name. You can change supplier without starting over.
What we do not do
No 3D games or apps that need pure native code. No developer placed full-time at the client. If your project falls there, we will tell you.
Frequently asked questions
Building with React Native
Why React Native rather than native Swift and Kotlin?
One codebase for both platforms, so the budget and the maintenance shrink accordingly. Native is still better for a 3D game or an app that pushes the hardware hard. That is rare for a business app.
Can you take over an app built by someone else?
Yes. We start by reading the code and the state of its dependencies, then tell you what to keep, what to rewrite, and in which order.
Do you work on a time-and-materials or fixed-price basis?
Fixed price on a defined scope, with a detailed quote. For extra hands, we can work a monthly number of days, remotely.
Who publishes the app on the stores?
We prepare the listings, screenshots and builds, and follow Apple and Google review. The developer accounts stay in your name.
An app to build or to take over?
Tell us where the project stands. We will tell you where to start, and what the first step costs.