iOS first or
Android first?
For UK startups: build iOS first. UK iPhone market share is ~52%, iOS users spend ~2× more in apps, and iOS has a smaller device matrix — making it faster to build and test your MVP. Here's the full picture.
The recommendation for most UK startups
- You're targeting UK consumers (iPhone is ~52% of market)
- Your product is premium or subscription-based
- You need faster MVP validation — iOS QA is simpler
- Your audience skews toward higher income demographics
- You're building a fintech, wellness or productivity app
- Your market is outside the UK/US (Android dominates globally)
- You're targeting emerging markets or price-sensitive users
- Your enterprise client has an Android MDM requirement
- Your specific user research shows Android dominance
- You have Google ecosystem integrations (Workspace, Maps, etc.)
Best option for most MVPs: Use React Native or Flutter to build cross-platform (iOS + Android simultaneously) for 30–40% less than two native apps. If budget is tight, start iOS-only, then add Android in a following sprint.
UK smartphone market facts
iPhone market share in UK
UK is one of the highest iPhone-penetration markets globally. Sharply different to global Android ~72% majority.
iOS user app spend vs Android
iOS users spend roughly twice as much per user in the App Store vs Google Play — crucial for subscription and paid apps.
Cost saving with cross-platform
React Native or Flutter apps serving both iOS and Android cost 30–40% less than two separate native apps.
iOS vs Android vs Cross-platform
| Factor | iOS Only | Android Only | Cross-Platform |
|---|---|---|---|
| UK audience reached | ~52% | ~48% | 100% |
| Relative cost | Base cost | Similar to iOS | ~1.4× iOS alone, both platforms |
| QA complexity | Low — few devices | High — many Android variants | Medium |
| Revenue per user | Higher | Lower | Both covered |
| MVP speed | Fastest | Similar to iOS | Fast — shared codebase |
| Best for | Tight budget UK MVP | Global / emerging markets | Most projects (recommended) |
Native vs cross-platform: when does it matter?
When native (Swift / Kotlin) is worth it
- You need heavy platform-specific features (AR, advanced camera, NFC)
- Millisecond performance is critical (trading apps, gaming)
- You're integrating deeply with platform health APIs (HealthKit, Watch)
- Long-term platform-specific differentiation is your strategy
When React Native or Flutter wins
- You want both iOS and Android for 30–40% less cost
- Standard app patterns: forms, lists, maps, payments
- Faster iteration and shared design system
- Smaller team maintaining one codebase
- Most MVPs and business apps — this is the default recommendation
Common questions
Does building iOS first mean losing half my Android audience?
Temporarily, yes. But for most MVPs you want to validate with a subset of users first anyway. Build iOS, gather feedback, iterate, then ship Android. The 2-platform gap is typically 2–4 months — a small window for a validated product.
Can I launch on iOS and Android simultaneously?
Yes — with React Native or Flutter. We build one shared codebase that runs on both. Cost is ~40% more than iOS alone, not 100% more. This is what we recommend for most projects where budget allows.
What does a cross-platform app cost at Mantar Tech?
A cross-platform MVP (iOS + Android via React Native) starts from £12,000. A more complete app with backend, user accounts and integrations typically costs £25,000–£50,000. All fixed price. See also: Mobile App Development UK.
Does iOS really have higher revenue per user than Android?
Yes — consistently, across multiple studies. iOS users spend approximately twice as much in apps as Android users globally. In the UK, where iPhone market share is higher (~52%), the difference is less dramatic than in global averages, but the revenue gap persists.
Is React Native good enough for a serious app?
Yes. Major apps built with React Native include parts of Meta's products, Shopify's mobile apps, and many fintech startups. For 95% of business use cases — forms, dashboards, payments, maps, chat — React Native performs as well as native and ships faster.
What if I don't know my users' devices yet?
Default to cross-platform. Build with React Native or Flutter — you cover both platforms, validate with real users, then check your analytics to see actual device splits. Don't guess; instrument and measure.
More guides for mobile app projects
Mobile App Development UK
iOS, Android and cross-platform mobile apps. Fixed price from £8,000.
Learn more →App Development for UK Startups
MVP-first development for founders. Fixed price, no equity.
Learn more →