Mobile app development costs in the UK in 2025 range from £15,000 for a simple MVP to over £500,000 for a large, complex platform. Most business apps for small to mid-size companies fall between £25,000 and £120,000 depending on features, platform choice, and the level of design quality required.
This guide gives you honest, current price ranges for every category of mobile app — backed by what UK development agencies and freelancers are actually charging in 2025 — and explains the key factors that push costs up or down.
UK Mobile App Development Costs at a Glance (2025)
| App Category | Complexity | Estimated Cost (UK Agency) | Timeline |
|---|---|---|---|
| Simple MVP / prototype | Low | £15,000–£35,000 | 8–14 weeks |
| Business tool / internal app | Low–Medium | £25,000–£60,000 | 10–20 weeks |
| Consumer app (standard features) | Medium | £40,000–£90,000 | 16–28 weeks |
| Marketplace / two-sided platform | Medium–High | £75,000–£180,000 | 24–40 weeks |
| Complex platform with integrations | High | £120,000–£300,000+ | 32–52 weeks |
| Enterprise / large-scale app | Very high | £250,000–£600,000+ | 52+ weeks |
Note: These are UK agency rates for a fully managed development service including design, development, testing, and deployment. Freelancer rates are typically 30–50% lower but require you to manage the project yourself.
Platform Choice: iOS, Android, or Cross-Platform?
One of the first cost decisions is which platform you are targeting. The choice significantly affects both initial build cost and ongoing maintenance.
Native iOS (Swift/SwiftUI)
Building exclusively for Apple devices. Best performance and access to the latest iOS features. Typically costs £30,000–£100,000 for a medium-complexity app.
Native Android (Kotlin/Jetpack Compose)
Building exclusively for Android devices. Similar cost range to iOS: £28,000–£95,000 for equivalent complexity. Android testing adds cost due to device fragmentation (hundreds of device/OS combinations).
Building Both (iOS + Android separately)
Two separate codebases, maximum performance and platform-specific features. Roughly doubles development cost but gives the best user experience on each platform. Total: £60,000–£200,000+ for medium complexity.
Cross-Platform (React Native or Flutter)
A single codebase that runs on both iOS and Android. Typically 60–75% of the cost of building both platforms natively. Most medium-complexity apps are now built cross-platform — the performance gap with native has narrowed significantly and cost savings are substantial.
- React Native (Meta): Widely used, large talent pool in the UK, JavaScript-based
- Flutter (Google): Dart language, excellent performance, growing rapidly
For most UK businesses building a consumer or business app in 2025, cross-platform development (React Native or Flutter) is the recommended starting point unless you have a specific requirement that demands native.
What Drives Mobile App Development Costs Up
Every feature and requirement you add increases cost. The most significant cost drivers:
User authentication and accounts
Basic email/password login: £2,000–£5,000. Adding social logins (Google, Apple, Facebook), two-factor authentication, and enterprise SSO: £5,000–£15,000. Biometric authentication (Face ID, fingerprint): add £2,000–£4,000.
Backend API development
Most apps need a server-side backend to store data, handle business logic, and serve API responses. A basic REST API adds £8,000–£20,000. A complex, high-availability API with real-time features adds £25,000–£80,000.
Payment processing
Integrating Stripe, Apple Pay, or Google Pay: £4,000–£10,000. In-app purchases (subscriptions, one-time payments): £5,000–£15,000. Full marketplace payment handling with splits and payouts (Stripe Connect): £12,000–£30,000.
Real-time features
Push notifications: £3,000–£8,000. Real-time chat or messaging: £10,000–£25,000. Live location tracking: £8,000–£20,000. Real-time data sync (collaborative features): £15,000–£40,000.
Third-party integrations
Each integration (CRM, ERP, accounting software, shipping API, mapping service) typically adds £3,000–£15,000 depending on API quality and data complexity. Allow £5,000–£10,000 per major integration when estimating.
Offline functionality
Apps that work without an internet connection require local data storage, sync logic, and conflict resolution. This adds £8,000–£20,000 to a typical project.
Admin panel / dashboard
A web-based admin panel for managing app content, users, and data: £8,000–£25,000 depending on complexity. Often overlooked in initial budgets but essential for most business apps.
Custom UI/UX design
High-quality bespoke design significantly increases both quality and cost. A fully custom design system and UX process for a medium-complexity app: £10,000–£30,000. Using an existing UI kit reduces this to £3,000–£8,000.
Developer Rates in the UK (2025)
Understanding day rates helps you evaluate quotes and understand where budget goes.
| Developer Type | Day Rate (UK) | Monthly Equivalent |
|---|---|---|
| Junior mobile developer (1–3 years) | £250–£400/day | £5,000–£8,500/month |
| Mid-level mobile developer (3–6 years) | £400–£600/day | £8,500–£13,000/month |
| Senior mobile developer (6+ years) | £600–£900/day | £13,000–£19,500/month |
| Lead/architect (10+ years) | £800–£1,200/day | £17,000–£26,000/month |
| UX/UI designer | £350–£650/day | £7,500–£14,000/month |
| QA engineer | £300–£500/day | £6,500–£11,000/month |
A typical agency project team for a medium-complexity app: 1 project manager + 2 developers + 1 designer + 1 QA tester. At mid-level rates, this team costs approximately £50,000–£70,000 per month in blended resource cost — which is why 16-week apps cost £80,000–£120,000 even at mid-market rates.
Ongoing Costs After Launch
Mobile app costs do not stop at launch. Budget for:
- App Store fees: Apple Developer Program £79/year; Google Play one-time £21 registration
- Backend hosting: £50–£1,000+/month on AWS/Azure/GCP depending on traffic and architecture
- iOS/Android OS updates: Apple and Google release major OS updates annually. Each may require development work to maintain compatibility: £1,000–£5,000/year
- Bug fixes and maintenance: Budget £1,000–£5,000/month for an active app with regular use
- Feature development: Post-launch feature work is typically quoted at agency day rates
- App Store review management: Handling user reviews, responding to issues, managing ratings
Why Cheap Quotes Are Rarely Cheap
A £10,000 mobile app quote for a medium-complexity project is not a bargain — it is a warning sign. Apps built significantly below market rate typically:
- Cut corners on testing, resulting in crash-prone production apps
- Use outdated frameworks or poor code quality that costs 3–5x to fix later
- Omit security best practices, leaving user data vulnerable
- Deliver features that technically exist but perform poorly under real usage
- Come from developers who disappear after payment, leaving you unable to maintain or update the app
The most reliable signal of a realistic quote is a detailed breakdown — a line-item estimate by feature that adds up to the total. Any agency that cannot produce a feature-level breakdown has not properly scoped your project.
How to Get an Accurate Quote for Your App
- Write a feature list. List every screen, every user action, every integration your app needs. The more specific, the more accurate your quote.
- Specify platform requirements. iOS only, Android only, or both? Cross-platform acceptable?
- Define your MVP scope. What is the minimum version you need to test your product with real users? Defer non-essential features to phase 2.
- Ask for itemised quotes. Request a breakdown by feature area so you can compare like-for-like across agencies.
- Ask about the team. Who will actually build it? What are their levels of experience? Will senior developers be on your project or juniors supervised by a senior?
- Check their portfolio. Review apps they have actually shipped that are currently live in the app stores.
FAQ: Mobile App Development Cost UK
How much does it cost to make a simple app in the UK?
A genuinely simple app — 4–6 screens, basic functionality, no backend required — can be built for £15,000–£25,000 with a UK agency or £8,000–£15,000 with a freelancer. Most business apps are not simple, however. If your app needs user accounts, a backend, push notifications, and any integrations, budget £35,000–£60,000 minimum.
Is it cheaper to hire a freelancer than an agency in the UK?
Freelancer day rates are 30–50% lower than agency rates. However, you take on project management, QA, design, and coordination yourself. For projects under £30,000, experienced freelancers often provide the best value. For projects over £50,000, agencies provide project management, QA processes, and team redundancy that typically justify the premium.
How long does mobile app development take in the UK?
A simple MVP: 8–14 weeks. A medium-complexity consumer app: 16–28 weeks. A complex platform: 32–52 weeks. These timelines assume full-time dedicated development. Part-time teams or frequent scope changes significantly extend timelines.
Should I build for iOS or Android first in the UK?
In the UK, iOS has approximately 52% market share and Android 47% (2025 data). For consumer apps targeting mainstream UK users, iOS first is slightly more common. For business or enterprise apps, it depends on your target company's device policy. For tight budgets, starting with cross-platform development (React Native or Flutter) allows you to target both simultaneously at lower cost.
If you are scoping a mobile app project and want a realistic cost estimate based on your specific requirements, we offer free project scoping calls for UK businesses. We will give you an honest price range, a proposed approach, and the key questions to ask every agency you speak to.