Expert App Development Agency in London

It depends on complexity, but as a guide: design and prototyping typically runs £3,500–£11,000, an MVP build £16,500–£55,000, and ongoing support from £1,100 a month. Discovery is free. Every project is scoped individually, so the best next step is a quick conversation where we can give you an indicative range for your specific idea.

That depends on scope and whether you're building hybrid or native, but our typical path is roughly: 1–2 weeks of discovery, 2–4 weeks of design and prototyping, then 8–16 weeks of build and testing before launch. An Ionic hybrid app is usually quicker; a fully native app per platform takes longer. You can see the full breakdown in our process section above.

Discovery is a structured conversation to make sure we build the right thing. We agree your goals and success criteria, shortlist the features that matter for a first release, surface technical and commercial risks, and give you an indicative budget and timeline. It's free, and it gives you a clear plan you can take forward — with us or anyone else.

We scope work in phases and give you a clear price for each stage, so you always know what you're committing to before it starts. For well-defined pieces of work we can fix the price; for evolving products we work in sprints with a transparent rate and a visible backlog, so you stay in control of scope and spend throughout.

Almost always start with an MVP. It's a lean, launchable first version that puts your core idea in front of real users so you can learn what they actually value before you invest in the rest. It reduces risk, gets you to market faster, and the feedback shapes a far stronger full product than guessing up front would.

Yes, this is common. We start with an audit of the existing code, infrastructure and documentation so we understand what you've got and what state it's in. We'll be honest about whether it's best to continue, refactor or rebuild, then stabilise it and take it forward. You own the code throughout, so there's no lock-in either way.

You do. Your repositories, your intellectual property, no lock-in — we write code you can maintain with or without us. We're happy to sign an NDA before we discuss anything sensitive, and we'll set up the project so that ownership and access sit with you from day one.

Security is built in, not bolted on. We follow secure development practices, harden infrastructure and can arrange penetration testing and mobile app security testing for sensitive projects. We build with UK and EU data-privacy law in mind, so your app handles personal data responsibly and is ready for the compliance expectations of your sector.

Yes. We offer the full service — all we need from you is your vision. We submit your apps to the Apple App Store and Google Play and manage the whole process of compliance and verification with both. Just tell us what you want and we'll handle the rest.

We usually recommend hybrid or cross-platform — it works brilliantly for the likes of Facebook, Instagram and many other globally used apps, and gives you one codebase across iOS and Android for less cost and faster delivery. Native is the right call when a project needs the absolute best performance or deep platform features. We'll help you decide in discovery.

The two cross-platform frameworks we use differ mainly in speed-to-build and performance. Ionic has a more web-like approach, which keeps costs down and time-to-market quick. React Native offers a more native-like feel and a performance boost — it can take longer and cost a little more, but delivers a superior experience. We'll recommend the right one for your product.

Yes. Most apps we build talk to something — payment providers, CRMs, ERPs, booking systems or your own internal services. We're experienced in integrating third-party and bespoke APIs, and where the right integration doesn't exist yet we can build the back-end services to support it. We'll map out the integrations needed during discovery.

Where it genuinely helps users, yes. We integrate practical AI features — things like intelligent search, summarisation, chat assistants and recommendations — using modern LLMs and techniques like RAG. Experienced developers stay responsible for architecture, quality and what reaches your users, so AI accelerates the work without compromising reliability.

Thoroughly, and continuously. We test across real devices and screen sizes, combine automated checks with manual QA, and run a structured feedback round with you before anything goes live. Issues are caught and fixed during the build, not discovered by your users after launch.

Our team is entirely UK-based and works in-office, with studios in London (Shoreditch) and Belfast. We don't outsource development overseas or rely on fully-remote contractors. The senior people who design and build your app are the people you'll actually be working with.

Launch is the beginning of the relationship. With a support and maintenance retainer we keep your app secure, fix issues, monitor performance, keep it compatible with new OS versions, and add new features over time. Many of our clients work with us for years after their first release.

Absolutely. We're based at the White Collar Factory on Old Street Yard in Shoreditch, in the heart of London's tech scene. We're always happy to meet in person to talk through your project — get in touch and we'll arrange a time.