Build Service
Mobile App Development
iOS and Android apps built with React Native and Expo. One TypeScript codebase, a native feel on both platforms, shipped to the App Store and Google Play.
What we build
We design and build production mobile apps with React Native and Expo, so a single TypeScript codebase ships to both iOS and Android without maintaining two native teams. We handle the full lifecycle: architecture, navigation, offline state, push notifications, native module integration, in-app purchases, and the release pipeline into TestFlight and Google Play internal testing. Because we came from quality engineering, every build ships with automated tests and a release process your team can run without us.
- React Native & Expo (iOS + Android)
- EAS Build, TestFlight & Play Releases
- Over-the-Air Updates & Release Channels
- Push Notifications & Deep Linking
- Automated Testing Built In
What you get
- Production React Native and Expo app for iOS and Android
- Typed API layer and state management your team can extend
- EAS Build and Submit pipeline with over-the-air update channels
- App Store and Google Play submission, review support and store assets
- Automated test coverage plus a documented handover to your engineers
How We Build
From idea to the App Store
Discovery and architecture
We map the product, the platform requirements and the data model, then agree an architecture, a release plan and realistic estimates before any code is written.
Design system and navigation
We build a typed component library and navigation structure that feels native on both platforms, with accessibility and dynamic type handled from the start.
Feature delivery in sprints
Features land behind pull requests with automated tests and CI. You get a build on TestFlight and Google Play every sprint, so feedback is on a real device.
Release and iterate
We handle store submission and review, then use over-the-air updates for fast follow-ups. Monitoring and crash reporting are wired in before launch, not after.
Frequently Asked Questions
- One TypeScript codebase ships to both iOS and Android, which roughly halves build and maintenance cost while still giving users a native feel. Expo handles the parts teams usually lose weeks to: builds, signing, over-the-air updates and store submissions. Where a feature genuinely needs platform code, such as a specific Bluetooth or HealthKit integration, we write a native module rather than compromise the product.
- A focused first release typically takes eight to twelve weeks from discovery to store submission, depending on how much backend work is involved. We put a build in your hands via TestFlight and Google Play internal testing within the first few weeks, so you are reviewing a real app on a real device long before launch.
- Yes. We set up EAS Build and Submit, prepare store listings, screenshots and privacy declarations, and manage the review process including responding to rejections. We also configure over-the-air update channels so you can push JavaScript fixes without waiting for another review cycle.
- Often, yes. We start with a short technical review of the codebase, dependencies and build pipeline, then give you an honest assessment: what is worth keeping, what needs rework, and what it will cost. We have picked up stalled and inherited apps and taken them to release.
- Always. That is where we came from. Apps ship with unit and component tests, end-to-end coverage of critical flows, and CI that runs on every pull request. We also test on real iOS and Android devices before release rather than relying on simulators alone.
Why React Native and Expo instead of fully native Swift and Kotlin?
How long does it take to get an app into the App Store?
Do you handle App Store and Google Play submission?
Can you take over or fix an existing React Native app?
Do the apps you build include automated testing?
Got an app to build?
Tell us what you want to ship and we will come back with an architecture, a realistic timeline and a fixed first milestone.