React Native vs Flutter vs Ionic -- UK Mobile Development (2026)
React Native (Expo) is ClickMasters default for all UK regulated mobile applications: native iOS and Android from one TypeScript codebase, best NHS Login integration, FCA Consumer Duty mobile UX testing (axe-react-native), and the largest UK mobile developer talent pool. Flutter is right for high-performance custom UI with complex animations. Ionic is legacy for new UK builds. Mobile framework choice affects NHS DTAC Domain 5 accessibility, FCA Consumer Duty mobile UX, and UK GDPR data residency on device.
| Factor | React Native (Expo) | Flutter (Dart) | Ionic (WebView) |
|---|---|---|---|
| NHS Login integration | BEST -- NHS Login React Native library (official support) | Flutter NHS Login -- community support | WebView -- adequate but less native |
| NHS DTAC D5 accessibility | BEST -- axe-react-native, VoiceOver + TalkBack native | Flutter Semantics widget -- good | WebView a11y -- less reliable |
| FCA Consumer Duty mobile UX | BEST -- native iOS/Android components -- familiar UX | Custom widgets -- can look non-native | WebView -- browser in shell |
| UK developer talent pool | BEST -- TypeScript React Native -- large UK pool | Dart -- growing but smaller | Web developers -- large but limited native |
| iOS HealthKit + Android Health Connect | BEST -- react-native-health library, native API access | flutter_health library -- good | Limited -- not native |
| MHRA SaMD App Store compliance | BEST -- native iOS + Android apps -- standard process | Native iOS + Android -- same process | Hybrid -- Apple Review medical category inconsistent |
| Performance (animations, custom drawing) | Good -- native rendering | BEST -- custom Skia rendering engine | Limited -- WebView performance |
| Expo managed workflow | BEST -- Expo Go, OTA updates, EAS Build | Flutter has similar tooling (pub.dev) | Capacitor -- different model |
| ClickMasters default | All NHS, FCA, GDS consumer-facing mobile | High-performance custom UI (gaming, complex animations) | Legacy projects only |
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