App DevelopmentWe build apps that are
real software,
owned by you.
Not templates, not no-code, not rented platforms. We design and engineer custom web and mobile apps from scratch, on a production stack, delivered fixed-price and handed over in full. We build our own too — so we know what shipping actually takes.
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 buildReal apps, built properly,
handed over in full.
We build the kind of app you own and grow, not the kind you rent and outgrow. Web, mobile, or both — engineered to last.
01
Web apps
Production web applications that reach everyone, no install required.
02
Mobile apps
Native iOS and Android, when usage lives on the phone.
03
Real engineering
A modern production stack, not a template or a no-code config.
04
Fixed price
You know the number before we start. No hourly meter.
05
Owned by you
The full codebase, handed over. No licensing, no lock-in.
Custom software, not a configured template
There is a lot that calls itself app development. Template shops that reskin the same product for every client. No-code studios that assemble something on a platform you then rent forever. Offshore teams billing hours against a spec nobody owns. All of it produces something app-shaped, and most of it leaves you unable to change or truly own what you paid for.
We build the other thing: real custom software, designed and engineered from scratch on a modern production stack, that becomes genuinely yours. When your app needs to do something specific, it can. When you want to change it, you can, because you own the code. When you outgrow us, you can take it to any team. That is what ownership means, and it is the difference between an asset and a subscription.
This matters most for founders building something that is meant to last. A template gets you live faster and cheaper, and for some things that is the right call. But if the app is the business, you want to own it — and owning it starts with it being real software in the first place.
The first decisionWeb, mobile, or both — decided honestly
The first real question in any app build is where it should live. Web reaches everyone instantly, works on every device, and needs no install — which is why it is often the smartest first move even for products people assume need an app. Mobile earns its place when the usage is frequent and on-the-go, when push notifications matter, when being one tap away on the home screen changes behaviour.
We give you the honest answer for your specific product, even when it is the smaller, cheaper one. Building a native app because apps feel impressive, when a web app would have reached more people for less, is one of the most common and expensive mistakes in app development. We would rather talk you into the right build than the bigger invoice.
And when the answer is both, we build both — often web first to reach and validate, then native mobile where the behaviour justifies it. The sequence is part of the strategy, not an afterthought.
ProofWe ship apps — our own, and for clients
The most useful thing we can tell you about app development is that we do it for ourselves, not only for clients. Loopa is a premium iOS app we built from scratch, end to end, on a modern React Native and Expo stack — a real, polished, shipped native product. sellyourboat.io is a Wall & Fifth venture: a full web platform and marketplace we built and run, carrying over 12,000 listings with a Claude-powered AI layer.
Building and running our own products means we have made the real decisions — architecture, scope, what to build first, what to cut — with our own money and reputation on the line. We have hit the production problems already, on our own apps, so you are not paying us to learn them on yours.
We have also delivered app and platform work for busesforsale.com, europeanyachtbrokers.com, and others. Shipping real software is not a claim for us, it is the pattern.
The buildProduction stack, fixed price, owned outright
We build on a modern production stack: Next.js, React, and TypeScript for web, React Native and Expo for mobile, with PostgreSQL behind them, deployed properly. It is the same foundation we build our own products on, chosen because it is genuinely good, not because it is cheap or trendy.
We work to a fixed price so you are never exposed to an open-ended hourly meter. From 16,000 GBP for a focused app MVP, from 30,000 GBP for a larger build with more users, features, and integrations. Third-party usage — payments, AI inference, mapping — is passed through to you at cost, never marked up. There is a dedicated cost page if you want the full breakdown.
And you own all of it: the full codebase, the infrastructure, any store listings, handed over on delivery. No licensing, no lock-in, no platform you keep paying to keep your product alive. Yours to run, change, and scale with us or any team you choose.
ProofWe build and ship real apps, including our own
Loopa is a native iOS app we built end to end. sellyourboat.io is a Wall & Fifth platform we built and run. The capability is proven, on our own account.
12,000+
platform listings we run
100%
code ownership, yours
PricingFixed price, scoped to the app
A defined price for a defined build. You know the number before we start.
App MVP
from £16,000
A focused custom app, web or mobile, with the core flows that make it real and ready to launch.
Extensive Build
from £30,000
A larger app with multiple user types, richer features, integrations, and admin, built to scale.
Embedded Partner
from £8,000 /mo
Ongoing senior involvement once it is live: shipping, evolving, and growing the product over time.
Build an app
you actually own.
Tell us what you are building and who it is for. We will scope it, price it, and build it as real software that is yours.