Quotes for mobile app development in the UK vary by 10x for what looks like the same product. £5,000 from an offshore developer, £15,000 from a UK freelancer, £45,000 from a London agency, £80,000+ from a top-tier consultancy. The difference isn't just markup — it's real differences in scope, quality, ownership, and what happens after launch. This guide breaks down what you actually pay for what you actually get.
The TL;DR (UK Mobile App Pricing, 2026)
- Cross-platform MVP (React Native, focused scope): £8,000 – £25,000
- Cross-platform mid-complexity (with custom backend): £20,000 – £45,000
- Complex native (Swift + Kotlin, advanced features): £35,000 – £100,000+
- Ongoing maintenance: £150 – £500/month for OS-update compatibility, dependency upgrades, bug fixes
- App Store fees: Apple £79/year + Google £20 once
- Backend / cloud hosting: £20 – £500/month depending on user load
What Drives The Cost
Five factors account for most of the variation: cross-platform vs native (cross-platform with React Native or Flutter is roughly half the cost of native iOS + native Android), backend complexity (a thin app on top of an existing API is cheap; a custom backend with authentication, payments, and data sync is not), design polish (templated UI is cheap; custom illustration and motion design is not), third-party integrations (each one adds days of work), and compliance requirements (medical, financial, child-safety apps need extra layers).
What You Get At Each Tier
£8,000 – £25,000 — Cross-platform MVP
What it is: A focused first version built with React Native or Expo. iOS and Android from one codebase. 6-12 week build. Uses an existing backend (Firebase, Supabase, or your existing web API) rather than custom-built infrastructure.
What you get: 5-15 main screens, user authentication, push notifications, basic data sync, App Store + Google Play submission, TestFlight + Play Store internal testing, 30-day post-launch warranty period.
Right for: Validating a product idea, B2B internal tools, small-scale consumer apps, MVPs that need real users before further investment.
£20,000 – £45,000 — Mid-complexity with custom backend
What it is: Cross-platform app plus a custom backend handling business logic, payments, user roles, real-time features, third-party integrations. 3-6 month build.
What you get: 15-30 screens, role-based access, payment processing (Stripe, GoCardless), real-time features (chat, notifications, live updates), 3-5 third-party integrations, proper analytics, admin dashboard.
Right for: Production B2B apps, consumer apps post-MVP, marketplaces, booking platforms, anything where the backend logic is meaningful.
£35,000 – £100,000+ — Complex native
What it is: Native iOS (Swift) and native Android (Kotlin) — separate codebases. Required when you need maximum performance, deep platform integration (AR, ML, advanced graphics), or platform-specific UX patterns done perfectly. 6-12 month build.
What you get: Apps that feel native because they are native. Smoother animations, better OS integration, access to the latest platform features the day they launch. Plus separate iOS and Android teams or one developer doing both more slowly.
Right for: Consumer apps where performance is the product (games, AR, video), apps with extensive platform-specific features, established companies where the brand expectation rules out cross-platform compromises.
Cross-Platform vs Native: The Real Trade-Off
For 80% of UK app projects, modern cross-platform (React Native or Flutter) is the right call. The performance gap with native has narrowed to the point where most users can't tell. The cost saving is substantial — one codebase instead of two means roughly half the development time and half the maintenance burden ongoing.
Native still wins for: graphics-heavy apps (games, AR, complex animation), apps that need to ship the moment a new iOS or Android feature releases, deep platform integration (HealthKit, ARKit, Live Activities, Widgets), and apps where every milliseconds of latency matters.
Scope Traps That Blow The Budget
- “We'll figure out the backend later” — the backend often IS the project. A simple-looking app with no backend strategy becomes the most expensive part of the build.
- “Just add payments” — payments mean Stripe integration, subscription handling, refunds, invoice flow, tax handling (UK VAT), App Store / Google Play in-app purchase rules. Easily £3,000-£8,000 of work depending on complexity.
- “Add chat” — chat sounds simple but means real-time messaging infrastructure, message history, notifications, attachments, moderation. £5,000+ to build properly or £50/month per active user via SendBird/Stream.
- App Store rejection cycle — apps that don't plan for review guidelines get rejected, sometimes multiple times. Add 2-4 weeks contingency for first submission.
- Forgetting the launch — App Store optimisation, screenshots, descriptions, privacy policy, marketing site, beta testing programme. Usually £1,000-£3,000 of additional work.
- Underestimating maintenance — iOS and Android release major OS updates yearly. Without ongoing maintenance, apps break within 12-18 months. Budget £150-£500/month or expect to rebuild eventually.
UK Freelancer vs UK Agency vs International
UK Freelance Developer (£8,000 – £40,000)
Direct relationship, faster decisions, lower cost. Limited bandwidth if you need parallel workstreams. Best for focused MVPs and mid-complexity apps.
UK Agency (£25,000 – £150,000+)
Team of designer, developer, project manager. Best when you need brand/UX work in parallel with development, or when you're a corporate buyer who needs the assurance of a registered business with full insurance.
International Agency (£3,000 – £25,000)
Real cost savings possible but check carefully: do you own the App Store account in your name? (often not), do you own the code and GitHub repo? Can you maintain or extend the app without that agency? What happens when something breaks in year two? Cheap upfront often becomes expensive when you can't move the app to another developer.
Realistic Pricing By App Type
- Internal team tool (B2B, single role): £8,000 – £15,000
- Simple consumer app (no payments, no chat): £10,000 – £20,000
- Loyalty / rewards app for a retail or hospitality chain: £15,000 – £30,000
- Booking platform (multi-vendor): £25,000 – £60,000
- Marketplace (two-sided, payments, chat): £40,000 – £100,000+
- Field-service app with offline mode + GPS: £20,000 – £45,000
- Companion app for existing web platform: £10,000 – £25,000
How To Cut The Cost Without Cutting Quality
- Start with a focused MVP. Ship the 3-5 features that prove the value. Add more once real users tell you what they actually want.
- Cross-platform unless you have a reason not to. React Native or Flutter halves the cost vs native iOS + Android.
- Use proven backend services. Supabase, Firebase, Stripe, SendBird etc. Don't custom-build what you can rent for £50/month.
- Consider a PWA first. If push notifications and offline mode aren't critical, a Progressive Web App at 1/3 the cost might be enough.
- Plan for maintenance from day one. Budget the £150-£500/month ongoing — don't skip it and try to fix everything in year two.
Bottom Line
Most UK app projects that don't end in failure cost £10,000 – £30,000 for a focused first version. Anything quoted under £5,000 should be treated with suspicion (especially from offshore developers). Anything over £100,000 should require strong justification beyond brand-name agency markup.
The biggest cost-saving lever is scope discipline — ruthlessly cutting features that aren't needed for the first version, then iterating based on real usage data. The biggest cost-inflation lever is the opposite: trying to ship the “full version” on day one without proving any of it works.
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