Overview
Engineering costs in London vary by scope, platform and team seniority. This breakdown shows typical ranges we see across MVPs, v1 products and scale‑up initiatives.
Example cross‑platform healthcare app UI built in London
Typical MVP Ranges
- React Native MVP: £35k–£90k depending on features and integrations
- Flutter MVP: £30k–£85k with strong parity for common feature sets
- Native iOS + Android: £60k–£150k where platform‑specific UX or hardware access matters
These ranges assume 10–16 weeks of delivery with a senior‑leaning team, weekly demos, and CI/CD from day one.
Representative screen complexity that influences cost
What Drives Cost
- Authentication, payments, real‑time features and offline sync add complexity
- Third‑party integrations (Stripe, Maps, analytics, messaging) introduce hidden effort
- Design system maturity and reusability reduce long‑term cost
- CI/CD, observability and QA reduce risk but require upfront investment
Expect additional effort for Apple/Google review readiness, GDPR compliance, analytics, and app store metadata.
Internal dashboards and analytics often sit outside pure mobile scope
How We Estimate
We price from granular work packages mapped to milestones, with options for fixed‑scope MVPs or retainer‑style product iterations. Try the MVP calculator to tailor a quick estimate to your feature set.
Sample Line‑Item Breakdown
- Discovery & planning (1–2 weeks): £3k–£8k
- Design system & key screens: £6k–£15k
- Core features (auth, data, integrations): £15k–£45k
- QA, test automation & polish: £5k–£12k
- App store prep & deployment: £2k–£6k
Use our calculator to benchmark quickly, then run discovery to confirm scope and budget bands.