One of the most common questions from UK businesses exploring mobile app development is: how much will it actually cost? The honest answer is that it depends — but that's not helpful. So here's a practical breakdown of what drives mobile app costs, what realistic budgets look like, and what you get at each price point.
What affects the cost of a mobile app?
Several factors determine the final cost of a mobile app project. The complexity of your feature set is the biggest driver — a simple informational app with five screens costs far less than a marketplace with user accounts, payments, real-time messaging, and push notifications. The platform also matters: building for iOS and Android separately costs roughly twice as much as a cross-platform Flutter app that covers both from a single codebase. Backend requirements — whether you need a custom API, database, and authentication system, or can use a service like Firebase — also add to the overall scope. Finally, the quality of UI/UX design, the need for third-party integrations, and post-launch support all factor into the total investment.
Realistic cost ranges for UK businesses
For a focused MVP — a single-platform app with core features, basic UI, and a simple backend — budgets typically start from around £1,500 to £4,000. This is appropriate for validating an idea with early users before committing to a full build. A starter product covering both iOS and Android with proper authentication, a backend API, and polished UI typically falls in the £4,000 to £10,000 range. For a professional, production-ready app with third-party integrations, custom design, performance optimisation, and store submission, budgets of £10,000 to £25,000 are realistic. Enterprise-grade apps with complex workflows, AI features, advanced security, and dedicated architecture typically require £25,000 and above.
Why cross-platform Flutter is the smart choice for most UK businesses
Building a native iOS app and a native Android app separately doubles your development cost and your ongoing maintenance burden. Flutter, Google's cross-platform framework, allows a single codebase to compile to genuinely native performance on both platforms. For most business use cases — e-commerce, booking, logistics, fintech — Flutter delivers the same quality at roughly half the cost of building two separate apps. It's the framework I use for the majority of mobile projects, and it's increasingly the choice of UK startups and scale-ups looking to move fast without compromising quality.
What to watch out for when getting quotes
When comparing quotes from developers or agencies, make sure you're comparing like for like. A low quote that excludes UI design, backend development, testing, and store submission may end up costing more than a higher quote that includes everything. Ask specifically what's included in the scope, who will be doing the work (junior or senior developers), and what happens after launch. At Inpured, every quote includes a fixed scope, a clear timeline, and 30 days of post-launch support as standard — so there are no surprises.
Mobile app development costs in the UK vary widely, but understanding what drives pricing puts you in a much stronger position to evaluate quotes and make a smart investment. If you're considering a mobile app for your business and want a straight conversation about scope and pricing, book a free discovery call and I'll give you an honest assessment within 48 hours.