Building an app in London costs between £9,990 and £80,000+ in 2026. A cross-platform MVP starts at £9,990, a full production app at £24,990, and enterprise native builds at £49,950+.

Single platform for validation.
Cross-platform production app.
Enterprise native with compliance.
Building native iOS + Android separately costs ~40% more than cross-platform (Flutter/React Native) but delivers better performance for demanding apps.
FCA, PCI-DSS, and NHS DSP compliance add 20–30% to development cost due to security controls, audit trails, and penetration testing.
A simple Firebase backend is much cheaper than a custom API with real-time features, multi-tenancy, and complex business logic.
Budget for ongoing maintenance (£1,200+/month) — OS updates, bug fixes, and feature iterations are not optional for live apps.
We'll analyse your site and tell you exactly what app development scope and budget you need. 12-page PDF in 90 seconds.
No obligation · GDPR compliant · Delivered in 90 seconds
Get started today — 40% below London market average. Free audit available.