Short version: a simple mobile app (MVP, one core workflow) typically costs £8,000–£30,000 in 2026. A production app for a growing business runs £30,000–£80,000, and a complex or regulated app climbs to £80,000–£300,000+. Building one codebase for both iOS and Android with React Native is what keeps the number down.
Rough 2026 ranges (UK/EU)
- MVP / single-workflow app: £8,000–£30,000, ~8–12 weeks. One job done well, tested with real users.
- Standard production app: £30,000–£80,000, ~12–24 weeks. Multiple features, accounts, payments, backend.
- Complex / regulated app: £80,000–£300,000+, 6–12+ months. Heavy integrations, compliance, scale.
Why React Native saves money
Building separate native apps for iOS and Android means writing (and maintaining) two codebases. Cross-platform frameworks like React Native deliver both from one codebase — typically 25–40% cheaper than dual native, with one team and one release process. It's what we used to build Plutheia, a live investing app running on both platforms.
What actually drives the price
- Number of screens and features. Each real feature is design, build, and test time.
- Backend and integrations. Payments, third-party APIs, real-time data all add scope.
- Compliance and security. Fintech, health, or payments work costs more — for good reason.
- Ongoing costs. Budget for app-store fees, maintenance, and OS updates after launch.
How to spend well
Start with an MVP: the smallest app that delivers your core value, shipped to real users. Learn from it, then invest in what's working. That's how we scope app builds — see our Ecommerce & App Development service.
Thinking about an app? Tell us the idea and we'll give you a straight estimate.