Cross-Platform App DevelopmentWe build once,
and ship to both
iOS and Android.
One codebase, two native apps, roughly half the cost of building each separately. We build cross-platform with React Native — the exact approach we used for our own app — so you get genuinely native iPhone and Android apps without paying for two of everything.
app.yourmarketplace.com
Live marketplace
Two-sided liquidity, one platform
Supply and demand, matched. Listings, search, payments, and trust — built to move volume.
Recent activity
NNew listinglive
BBroker onboardedverified
EEnquiry matchedsent
PPayment cleared£4,200
Platforms and marketplaces we have built and worked on
Loopasellyourboat.ioKompiPaybusesforsale.comeuropeanyachtbrokers.com
What we buildOne codebase,
two native apps.
Genuinely native iOS and Android from a single codebase — the pragmatic choice for almost every product.
01
One codebase
Write once, run native on both iPhone and Android — no duplication.
02
Genuinely native
Native performance and feel, not a compromise, on both platforms.
03
Roughly half the cost
One build, one set of updates, instead of two of everything.
04
Both stores
App Store and Google Play submission handled from the one build.
05
Owned by you
The full codebase and both store listings, no app-builder lock-in.
For almost every product, cross-platform is the right call
The old choice was stark: build two separate native apps — Swift for iPhone, Kotlin for Android — and pay for two of everything, or pick one platform and abandon the other. Cross-platform development removed that trade-off. With one React Native codebase, you get genuinely native apps for both platforms, at roughly half the cost and effort, and every future update ships to both at once instead of twice.
The old objection was that cross-platform was not really native — slower, clunkier, a compromise. For the apps most founders are building, that has simply not been true for years, and we know it firsthand because we built our own app this way. The result is native performance and native feel on both platforms, from a single, maintainable codebase.
So for almost every founder product, cross-platform is not the budget option — it is the correct engineering decision. Paying for two native codebases when one delivers the same result for your users is money that should go into the product instead.
The honest exceptionWhen we would tell you to go fully native instead
We would not be honest if we said cross-platform is right for literally everything. There is a narrow set of products where fully native genuinely earns its extra cost: graphically heavy games, apps pushing the device hardware to its limits, or products that lean hard on the very newest platform-specific capabilities the moment they ship. For those, native can be worth building twice.
But it is a narrow set, and most founder products are firmly outside it — a marketplace, a social app, a SaaS companion, a booking tool, a content app. For all of those, cross-platform delivers everything the product needs without the doubled cost. Part of our job is telling you honestly which side of that line you are on, rather than defaulting to whatever bills more.
In practice, we have recommended fully native rarely, and cross-platform almost always — because that is what genuinely serves most products best. We will give you the honest read for yours.
ProofWe built our own app cross-platform: Loopa
The clearest proof we can offer on cross-platform development is that we built our own app this way. Loopa is a premium app we built from scratch, end to end, on a modern React Native and Expo stack — the exact cross-platform approach, shipped as a real, polished product.
Building it meant making every real decision cross-platform development involves — architecture, native feel, performance, store submission — with our own product on the line, and getting a genuinely native result from a single codebase. We hit the actual problems and solved them, which is why we can build yours from experience rather than working them out on your budget.
We also build and run web platforms like sellyourboat.io, a Wall & Fifth venture with over 12,000 listings. Between our own cross-platform app and our own web platform, shipping real software is simply what we do.
The buildReact Native, both stores, owned outright
We build cross-platform apps on React Native and Expo — the exact stack we used for our own app — with TypeScript and PostgreSQL behind them, deployed properly. One codebase produces genuinely native iOS and Android apps, and we handle App Store and Google Play submission for both.
We build to a fixed price. From 16,000 GBP for a focused cross-platform MVP, often launched on one store first from a codebase ready for both, and from 30,000 GBP for a larger build across both platforms with richer features, push, and integrations. Third-party usage — push, payments — is passed through at cost, never marked up.
And you own all of it: the full React Native codebase, the backend, and both store listings, handed over on delivery. No app-builder platform you keep paying, no licensing, no lock-in. Yours to run and ship updates to across both platforms, with us or any team you choose.
ProofWe shipped our own app cross-platform
Loopa is a polished app we built on React Native — one codebase, genuinely native. We build yours the way we built ours.
1
codebase, both platforms
~50%
of a two-native-build cost
100%
code ownership, yours
PricingFixed price, one build for both
A defined price for a defined build. One codebase, both platforms, no doubling up.
Cross-Platform MVP
from £16,000
One React Native codebase, launched on one store first, with the core flows that make it real.
Extensive Build
from £30,000
Both iOS and Android from one codebase, with richer features, push, integrations, and admin.
Embedded Partner
from £8,000 /mo
Ongoing senior involvement once live: shipping to both platforms, growing the app over time.
Build once,
ship to both.
Tell us what you are building. We will build one native app for both platforms — the way we built our own, and for the right price.