The short answer: it depends (but we can be more helpful than that)
If you have ever Googled this question, you will have seen answers ranging from a few thousand pounds to half a million. That is not particularly useful. The reality is that app costs in the UK vary enormously based on complexity, platform and who you hire. This guide gives you a realistic framework for understanding what to expect.
What drives the cost of an app?
Before looking at numbers, it helps to understand the main factors that affect price:
Complexity and features
A simple app with five screens, a login and a contact form is a fundamentally different project from a marketplace with payments, messaging, notifications and admin tools. The more features you need, the more design, development and testing is required.
Platform: iOS, Android or both
Building for both iOS and Android means more work. Cross-platform frameworks like React Native and Flutter have reduced this gap significantly, but there is still additional testing and platform-specific work involved.
Design requirements
A polished, brand-aligned design with custom animations and micro-interactions takes longer than a clean but straightforward interface. Both can work well, but the level of design detail affects the budget.
Back-end infrastructure
Most apps need a server, database and API behind the scenes. Some use existing services like Firebase or Supabase to reduce costs, while others need fully custom back-end systems.
Integrations
Connecting to payment processors, mapping services, email platforms, CRMs or other third-party tools adds development time. Each integration has its own quirks and documentation to work through.
Typical cost ranges in the UK market
Based on current market rates from UK agencies and studios, here are the broad ranges you can expect:
Simple apps
A focused app with limited features, a single platform and a clean design. Think of a booking app, a simple ordering tool or a membership directory. UK agencies and freelancers typically quote these in the range of several thousand to low five figures.
Mid-complexity apps
Apps with multiple user roles, payment processing, notifications and a modest admin panel. Examples include client portals, fitness tracking apps or small marketplace platforms. These typically sit in the mid five-figure range from established studios.
Complex apps
Feature-rich applications with real-time functionality, complex business logic, multiple integrations and sophisticated admin tools. These can reach well into six figures depending on scope.
Freelancer vs agency vs studio
Who you hire makes a significant difference:
- Freelance developers offer the lowest rates but you are relying on a single person for design, development, testing and project management. Quality and reliability vary widely.
- Large agencies have higher overheads, which means higher prices. You often pay for account managers and layers of process that smaller projects do not need.
- Small studios (like us) sit in the middle. You get a dedicated team, structured process and quality assurance without the overhead of a large agency.
How to keep costs reasonable
Whatever your budget, there are sensible ways to get more value:
- Start with an MVP. Build the core features first, launch, gather feedback and iterate. You do not need everything in version one.
- Use cross-platform tools. React Native or Flutter can serve both iOS and Android from a single codebase, significantly reducing development time.
- Be clear about your requirements. Vague briefs lead to scope creep, which leads to higher costs. The more clearly you define what you need, the more accurate your quote will be.
- Choose managed back-end services. For many apps, services like Supabase or Firebase can handle authentication, databases and file storage without the cost of building everything from scratch.
Red flags to watch for
Be cautious of any developer or agency that:
- Quotes without asking detailed questions about your requirements
- Promises delivery in an unrealistically short timeframe
- Will not show you examples of previous work
- Insists on owning the source code after the project
- Cannot clearly explain their technology choices
What to do next
If you are considering building an app, start by writing down the core problem it needs to solve and the key features it needs to have. You do not need a technical specification. A clear description of what the app should do and who it is for is enough for any good studio to give you a realistic estimate.