React Native vs Flutter vs Expo — UK Mobile App Development (2026)
Expo (managed React Native) is the UK default for most new mobile apps: zero native configuration, OTA updates (deploy bug fixes without App Store submission), and the largest UK team familiarity (React developers can build mobile apps). Flutter is right when pixel-perfect custom UI is the priority (Flutter renders its own widgets — not native platform components). React Native bare is right for apps with complex native modules (biometric, NFC, Bluetooth). For NHS App integrations and GOV.UK-aligned mobile apps: React Native or Expo (NHS App is React Native). Mobile app framework choice affects App Store review time, App Store and Play Store privacy compliance, and developer team overlap with web codebase.
| Factor | Expo (managed React Native) | Flutter | React Native (bare) |
|---|---|---|---|
| Team overlap with web | ✅ React — same team builds web and mobile | Dart — separate skill, separate team | ✅ React — same team |
| NHS App integration | ✅ NHS App is React Native — component familiarity | Different framework — no NHS component library | ✅ NHS login via react-native-app-auth |
| UK GDPR (data residency) | Expo Application Services (EAS) — US-hosted builds | Google Infrastructure (US) | Self-hosted builds possible |
| OTA updates (fix without App Store) | ✅ Expo Updates — instant OTA | Flutter Shorebird (beta) | React Native CodePush |
| Custom native modules (NFC, BLE) | Limited in managed — eject to bare | ✅ Flutter Platform Channels — excellent | ✅ React Native Bridge — good |
| Apple ATT compliance | Expo SDK handles ATT prompt — compliant | Manual ATT implementation | Manual ATT implementation |
| Core Web Vitals equivalent (mobile) | ✅ React Native Performance — measurable | Flutter Performance — measurable | ✅ React Native Performance |
| App Store review time (typical UK) | 2–5 days | 2–5 days | 2–5 days |
| ClickMasters default | ✅ All UK consumer mobile apps | Pixel-perfect custom UI (luxury, gaming) | NFC/BLE/biometric-heavy apps |
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