How Much Does Mobile App Development Cost in the UK in 2026?

The honest answer

Mobile app development in the UK costs between £10,000 and £500,000+, depending on the complexity of the app, the platforms you need to support, and the team you hire. That is a wide range, so this guide breaks it down into realistic categories with actual pricing, timelines and the factors that drive costs up or down.

If you are a business owner, startup founder or product manager trying to budget for a mobile app, this article will give you the information you need to have informed conversations with development teams and avoid the most common budgeting mistakes.

We build mobile applications for UK businesses using Flutter and React Native — cross-platform frameworks that let you ship to iOS and Android from a single codebase. The figures in this guide are based on our own project data and the broader UK market.

Pricing by app complexity

Simple apps (£10,000 – £40,000)

Simple apps have a focused purpose, limited features and a straightforward user interface. Examples include:

• A branded content app (news, articles, media)
• A simple booking or reservation app
• An event app with schedule, speakers and notifications
• A basic loyalty or rewards app
• A calculator or utility tool

These apps typically have five to fifteen screens, minimal backend requirements (or use a Backend-as-a-Service like Firebase or Supabase), basic user authentication and limited integrations.

Timeline: 4–8 weeks

At the lower end (£10,000–£20,000), you get a functional app with a clean design that covers the core use case. At the upper end (£20,000–£40,000), you get custom design, offline support, push notifications and basic analytics.

Medium-complexity apps (£40,000 – £120,000)

Medium-complexity apps have multiple user flows, backend services, integrations and more sophisticated user interfaces. Examples include:

• An e-commerce app with catalogue, cart, checkout and order tracking
• A fitness or health tracking app with data visualisation
• A field service app with scheduling, job management and reporting
• A social features app with profiles, messaging and content feeds
• A property listing or marketplace app

These apps typically have fifteen to forty screens, a custom backend with database, user authentication with roles, payment processing, push notifications and two or more third-party integrations.

Timeline: 8–16 weeks

This is the category where most business apps fall. The cost is driven primarily by the number of features, the complexity of the backend and the level of design polish required.

Complex apps and platforms (£120,000 – £500,000+)

Complex apps are full platforms with extensive features, multiple user types, real-time capabilities and significant backend infrastructure. Examples include:

• A ride-hailing or delivery platform (driver app, customer app, admin dashboard)
• A fintech app with account management, transactions and regulatory compliance
• A healthcare app with clinical workflows, data integration and compliance requirements
• A marketplace with multi-party transactions, reviews and dispute resolution
• A real-time collaboration or communication platform

These apps have forty or more screens, complex backend architecture, real-time features, extensive integrations, sophisticated security requirements and often regulatory compliance needs.

Timeline: 16–40+ weeks

At this level, you are not building an app — you are building a platform. The mobile app is one component of a larger system that includes a backend, an admin dashboard, potentially a web application, and integration with multiple external services.

Native vs cross-platform: cost comparison

The choice between native and cross-platform development is one of the biggest cost decisions you will make:

Our recommendation: For most UK businesses, cross-platform development with Flutter or React Native is the right choice. You get both iOS and Android from a single codebase at 60–70% of the cost of two native apps. The performance gap between cross-platform and native has narrowed to the point where most users cannot tell the difference.

When to go native: If your app relies heavily on platform-specific features (ARKit on iOS, specific Android hardware APIs), if you are building a game, or if you need the absolute maximum performance for computationally intensive tasks. These cases represent less than 10% of business apps.

Flutter vs React Native in 2026

Both are excellent frameworks. Here is how they compare for UK businesses:

If your team already uses React and TypeScript for web development, React Native is the natural choice — shared language, shared patterns, shared developers. If you are starting fresh or prioritise pixel-perfect custom UI, Flutter has the edge.

Development phases and what each costs

Understanding where your money goes helps you make better trade-offs. Here is a typical cost breakdown for a medium-complexity app (£60,000–£100,000 total):

Discovery and planning (5–10% of budget)

Cost: £3,000–£10,000 Duration: 2–4 weeks

This phase defines what you are building, for whom, and why. It produces wireframes, a technical specification, a project plan and a budget. We cover why discovery phases are essential in a separate article, but the short version is: spending 5–10% of your budget on planning typically saves 20–40% on the build.

Deliverables: user personas, feature specification, wireframes, technical architecture, project plan, budget.

UI/UX design (15–25% of budget)

Cost: £8,000–£25,000 Duration: 3–6 weeks

Mobile app design is more constrained than web design — you are working within Apple's Human Interface Guidelines and Google's Material Design standards — but the constraints do not make it easier. Good mobile design requires understanding gesture patterns, thumb zones, screen density variations and platform conventions.

This phase produces high-fidelity mockups for every screen, interaction design for animations and transitions, and a design system that ensures consistency. If you already have a brand guide and design system from your web product, this cost drops by 20–30%.

Deliverables: high-fidelity designs (Figma), interaction specifications, design system, asset library.

Frontend development (30–40% of budget)

Cost: £20,000–£40,000 Duration: 6–12 weeks

This is the app itself — the screens, the interactions, the data display, the forms, the navigation. For a cross-platform app, this is a single codebase that produces both iOS and Android builds.

The cost scales directly with the number of screens and the complexity of the interactions. A list screen with search and filtering is a day of work. A real-time map with custom markers, clustering and live tracking is a week.

Backend development (15–25% of budget)

Cost: £10,000–£25,000 Duration: 4–8 weeks (runs in parallel with frontend)

The backend handles authentication, data storage, business logic, notifications and integrations. For simple apps, a Backend-as-a-Service like Firebase or Supabase can handle this for a fraction of the cost of a custom backend. For anything involving complex business logic, a custom backend is necessary.

Backend cost is often underestimated. The app is the visible part of the iceberg; the backend is everything underneath it. User authentication, data validation, security, API design, database optimisation, file storage, email notifications, push notification infrastructure — it adds up.

Testing and quality assurance (10–15% of budget)

Cost: £5,000–£15,000 Duration: 2–4 weeks

Mobile testing is more complex than web testing because of device fragmentation. Your app needs to work across hundreds of device models, multiple OS versions, different screen sizes and varying network conditions. A comprehensive testing strategy includes unit tests, integration tests, end-to-end tests and manual testing on real devices.

We test on a minimum of eight devices covering the most common screen sizes and OS versions in the UK market. We also test on slow network connections and in airplane mode to ensure graceful degradation.

App Store submission and launch (2–5% of budget)

Cost: £1,000–£3,000 Duration: 1–2 weeks

Submitting to the Apple App Store and Google Play Store is not just uploading a file. It involves preparing screenshots and promotional graphics, writing App Store descriptions and metadata, configuring App Store Connect and Google Play Console, handling Apple's review process (which can take one to seven days and may require revisions), and setting up analytics and crash reporting.

Apple's review process is the most common cause of launch delays. They reject apps for a wide range of reasons — privacy policy issues, metadata problems, UI guideline violations, content concerns. An experienced team knows what Apple looks for and prepares for it proactively.

Ongoing costs after launch

The launch is not the finish line. Here are the ongoing costs to budget for:

Hosting and infrastructure (£100–£1,000/month)

Your backend needs to run somewhere. Cloud hosting costs depend on user volume, data storage and processing requirements. For a typical business app with up to 10,000 monthly active users, expect £100–£300/month. For apps with heavy media, real-time features or high user volumes, costs increase accordingly.

App Store fees

• Apple Developer Programme: £79/year
• Google Play Developer: £20 one-off registration
• Apple commission: 15–30% on in-app purchases and subscriptions
• Google commission: 15–30% on in-app purchases and subscriptions

If your app monetises through in-app purchases or subscriptions, the 15–30% commission is a significant ongoing cost. Both Apple and Google now offer reduced 15% rates for small businesses earning under $1 million annually.

Maintenance and updates (15–20% of build cost per year)

Mobile apps require regular maintenance: OS updates (Apple releases a new iOS version every year, and you need to ensure compatibility), security patches, bug fixes, performance optimisation, and minor feature updates. Budget 15–20% of your initial build cost per year.

For a £80,000 app, that is £12,000–£16,000 per year in maintenance. This is not optional — an unmaintained app will eventually break when the operating system updates, and Apple will remove apps from the App Store if they are not updated regularly.

Push notification services (£0–£200/month)

Firebase Cloud Messaging (FCM) is free for basic push notifications. More sophisticated notification services with segmentation, analytics and automation (OneSignal, Braze) cost £50–£500/month depending on volume.

Analytics and monitoring (£0–£300/month)

You need to understand how users interact with your app. Firebase Analytics is free and covers basic needs. More advanced analytics (Mixpanel, Amplitude) and crash reporting (Sentry, Crashlytics) add £50–£300/month.

Timeline estimates

Here are realistic timelines for mobile app projects, from initial brief to App Store availability:

These timelines assume a dedicated team of two to four people. Adding more people does not proportionally reduce the timeline — coordination overhead means a team of six is not twice as fast as a team of three.

The most common cause of timeline overruns is not development — it is content and decision-making. Delayed design feedback, missing content, stakeholder alignment and scope additions are responsible for more delays than technical challenges.

How to choose the right development partner

Look for mobile-specific expertise

Web development and mobile development are different disciplines. A team that builds excellent websites may not have the specific skills needed for mobile: understanding App Store guidelines, handling device fragmentation, optimising for battery life, managing offline states and implementing platform-specific patterns.

Ask potential partners: How many mobile apps have you shipped to the App Store? How do you handle Apple review rejections? What is your approach to testing across devices? Can you show us apps you have built that we can download?

Evaluate their process

A good mobile development partner should be able to walk you through their process clearly: how they run discovery, how they design, how they develop, how they test, how they deploy, how they handle post-launch support. If the process sounds vague or ad hoc, that is a red flag.

Check their post-launch support model

Mobile apps need ongoing maintenance. Ask about their support retainers, response times, how they handle emergency bug fixes and how they manage OS compatibility updates. The team that builds your app should be available to maintain it, or provide a thorough handover to your in-house team.

Understand their pricing model

Fixed-price works well for well-defined projects with clear specifications. Time-and-materials works better for projects where requirements are still evolving. Hybrid approaches — fixed-price discovery, time-and-materials build with a budget cap — often provide the best balance of cost certainty and flexibility.

Be wary of quotes that are dramatically lower than the market rate. Mobile development in the UK costs what it costs because of the skill level required. A quote that is 50% below market typically means the team is cutting corners on design, testing or code quality — and you will pay for those savings in maintenance costs and user experience issues.

Frequently asked questions

Do I need a mobile app, or will a responsive website work?

For most businesses, start with a responsive website. A mobile app makes sense when you need push notifications, offline functionality, access to device hardware (camera, GPS, biometrics), or when your users expect a native experience. If your product is content delivery, lead generation or e-commerce, a responsive website built with modern frameworks performs nearly as well as a native app.

How much does it cost to maintain a mobile app per year?

Budget 15–20% of the initial build cost per year. For a £60,000 app, that is £9,000–£12,000 annually. This covers OS compatibility updates, security patches, bug fixes, minor feature improvements, hosting and third-party service costs. Major feature additions are budgeted separately.

Should I build for iOS or Android first?

In the UK, iOS has approximately 50% market share. If your target audience is professionals, higher-income consumers or business users, iOS may skew higher. If you are targeting a broader demographic or younger users, Android may be more relevant. With cross-platform development (Flutter or React Native), you do not need to choose — you get both from one codebase.

Can I build an app with no-code tools?

Yes, for simple use cases. Tools like FlutterFlow, Adalo and Glide can produce functional apps for internal tools, simple workflows and prototypes. They cost significantly less than custom development (£2,000–£10,000). However, they have limitations in terms of performance, customisation, offline support and scalability. If your app is core to your business and needs to scale, custom development is the better long-term investment.

How long does it take to get approved on the App Store?

Apple's review process typically takes one to three days, but it can take up to a week, especially during busy periods (the weeks around new iOS releases and the holiday season). Plan for at least one rejection on your first submission — it is common and usually involves minor issues like metadata, privacy policy or screenshot requirements. Google Play reviews are typically faster (hours to two days).

What is the difference between a native app and a progressive web app (PWA)?

A native app is installed from the App Store or Google Play, runs on the device and has full access to device features. A PWA is a website that behaves like an app — it can be installed on the home screen, work offline and send push notifications (on Android). PWAs cost significantly less than native apps because they are web technologies. However, iOS support for PWAs is more limited, and some users expect the App Store experience.

Can I launch an MVP app and add features later?

Absolutely — and we strongly recommend it. Launch with the three to five features that deliver your core value proposition, gather user feedback, and iterate. The most successful apps in every category started with a fraction of their current features. Building an MVP first also reduces your upfront investment and gets you to market faster, which is critical for validating your business model.

How do I estimate the return on investment for a mobile app?

Identify the business value your app creates: revenue from in-app purchases or subscriptions, cost savings from process automation, increased customer retention, reduced support costs, or new customer acquisition. A £60,000 app that generates £15,000 per month in subscription revenue pays for itself in four months. An internal app that saves ten hours of manual work per week at £25/hour pays for itself in about four and a half years, or far sooner if you factor in error reduction and employee satisfaction.

The bottom line

Mobile app development is a significant investment, but it can deliver significant returns. The key is matching your ambition to your budget, choosing the right technical approach and building in phases rather than all at once.

Start with a clear understanding of why a mobile app is the right solution (not just a website). Define your core value proposition. Run a discovery phase to validate your assumptions and create a realistic specification. Build the smallest useful version first. Launch, learn and iterate.

The UK mobile development market is competitive and transparent. Good teams will give you honest advice about what you need, what it will cost and how long it will take. Seek teams that push back on unnecessary features — they are saving you money.

If you are planning a mobile app and want an honest assessment of cost and feasibility, get in touch. We will review your requirements and give you a transparent estimate within two working days.