Codexlava builds iOS and Android apps for UK businesses from a single React Native codebase — customer apps, field and staff apps, and mobile front doors to the systems you already run.
Every feature is built once, the app shares a back end with your website, and it is published under your own store accounts, so it is yours from the first day.
A business app earns its place when people use it again and again. These are the five kinds we are asked for most.
Bookings, accounts, orders and repeat purchases in your customers’ pockets — on the same back end as your website, so a change made in one place shows up in both.
Jobs, checklists, photos and signatures captured where the work happens, and synced when there is signal.
A mobile front door to a platform you already run, using its existing data and rules.
The smallest app that puts the idea in front of real users, on foundations the full product can grow from.
Stripe for physical goods and services, plus the CRM and office systems the app needs to talk to.
We build React Native, because for most business apps it is the better trade. This is where each option wins — including the two we would not sell you.
| Fully nativeSwift and Kotlin | React NativeWhat we build | Web appIn the browser | |
|---|---|---|---|
| Codebases to maintain | Two, one per platform | One, for iOS and Android | One |
| In the App Store and Google Play | Yes | Yes | No — opened from a link |
| Device features | All of them, first | Nearly all, through native modules | A limited set |
| Cost of a change | Made twice | Made once | Made once |
| Best for | Graphics-heavy games, deep hardware work | Most business and customer apps | Tools that do not need an app icon |
Most of the time UK adults spend online is now spent on a smartphone, across dozens of apps a month. And since April 2026, Apple and Google have been held to fairer app review commitments by the UK competition regulator.
Sources: Ofcom, Online Nation 2025 (December 2025); Competition and Markets Authority, app store commitments (February 2026). Market context, not Codexlava results.
The same four-stage process as every build, with the parts only an app has.
User flows, wireframes, then a clickable prototype you try on your own phone — the cheapest point to change your mind.
React Native and TypeScript for the app; an API in Django, FastAPI or Express.js that your website or other systems can share.
iPhones and Android phones of different sizes and ages, because a simulator does not have a weak signal or an old battery.
Listings, screenshots and privacy details prepared and submitted under your own developer accounts, so the app is yours from day one.
Apple and Google release new operating systems every year. Crash reports come in through Sentry, and updates go out through the same stores.
Same mainstream tools as the rest of our stack, so the app, the website and any internal tools can share one system.
One codebase for iOS and Android, with types to keep a growing app maintainable.
The server the app talks to — and the same one your website or internal tools can use.
Records, sync and the slow jobs — notifications, imports, reports — run off the request so the app stays quick.
Payments, customer records and staff sign-in, through the systems you already pay for.
The back end, containerised and sized for real usage rather than a launch-day guess.
Crash and error reporting from real phones, and every change built and checked before release.
If you are in the second column, we will say so on the first call rather than sell you something you do not need.
You approve each stage before the next one starts, and you own everything you paid for.
Tried on your own phone and signed off before the build starts.
Built once, and ready for your website or other systems to share.
Working app builds throughout, not a demo at the end.
Prepared and submitted to the App Store and Google Play under your accounts.
So your own team, or whoever comes next, can maintain and release it.
What a React Native app costs in the UK in 2026, from published guides: by complexity, iOS and Android MVPs, and the running costs after launch.
React Native and Flutter compared for business apps: language, interface, hiring and when each is the better fit, written fairly by a React Native team.
A prototype, a proof of concept and an MVP answer three different questions. Which one you need first, and what each costs you.
Testing an app idea first? Start with an MVP — the smallest version that real users can try.
One call, no obligation. We will tell you what the work involves, roughly what it costs, and whether we are the right people to do it.