What is cross-platform mobile development?
Cross-platform mobile development is an approach to building mobile applications that uses a single shared codebase to generate apps for both iOS and Android. Unlike native development where iOS apps are written in Swift and Android apps in Kotlin, requiring two separate codebases cross-platform frameworks enable a single team to build and maintain one codebase that compiles to or renders on both platforms. The two leading cross-platform frameworks are React Native (JavaScript/TypeScript, developed by Meta) and Flutter (Dart, developed by Google). Cross-platform apps typically share 75-90% of their code, with 10-25% of platform-specific code for navigation patterns, permissions, and hardware integrations. The primary benefit is cost: cross-platform apps typically cost 30-50% less to build and 20-40% less to maintain than two separate native apps.
What is the difference between React Native and Flutter?
React Native and Flutter are both cross-platform frameworks but differ in language, rendering approach, and ecosystem. React Native uses JavaScript/TypeScript the most widely used programming language and renders using native iOS (UIKit) and Android (Material) components, so the app looks and feels native on each platform. Flutter uses Dart Google's programming language and renders using its own Skia/Impeller rendering engine, so the UI looks identical on iOS and Android (Flutter's own design, not platform conventions). React Native is preferred for teams with existing JavaScript/React expertise and apps where native platform look-and-feel matters. Flutter is preferred for apps requiring sophisticated animations, custom UI that native components cannot achieve, or pixel-perfect consistent cross-platform design. Both deliver production-quality apps.
How much does cross-platform app development cost?
Cross-platform app development costs range from $2,000 for a framework selection and scoping engagement to $75,000 for a full enterprise cross-platform app with SSO, offline-first architecture, native module bridging, and both App Store and Google Play submission. A cross-platform MVP costs $20,000-45,000 and takes 8-12 weeks. A full-featured consumer app costs $28,000-65,000. For comparison, building the same app natively (separate Swift + Kotlin codebases) would cost $45,000-110,000 making cross-platform 30-45% more cost-effective for most use cases.
Is cross-platform app performance as good as native?
For the majority of app use cases data display, forms, lists, navigation, maps, camera, push notifications users cannot distinguish cross-platform app performance from native. React Native's New Architecture (JSI and Fabric) and Flutter's compiled-to-ARM Dart code with 60/120fps rendering both achieve smooth, responsive experiences that meet or exceed user expectations. Performance differences are noticeable in specific scenarios: very complex animations (where Flutter excels due to its direct rendering engine), intensive graphics (where native wins), and apps requiring immediate access to new platform APIs (where native has day-one support and cross-platform lags by weeks). For standard B2B and consumer app use cases, cross-platform performance is not a meaningful limitation.
Can a cross-platform app access all the native device features?
Yes, via platform bridges though with some caveats. React Native accesses platform-specific APIs via Native Modules (community-maintained packages for most common APIs, or custom Kotlin/Swift bridge code for bespoke APIs). Flutter accesses them via Platform Channels (MethodChannel for method calls, EventChannel for streams). Most common device features camera (CameraX/AVFoundation via community packages), GPS, Bluetooth, NFC, biometrics, push notifications have mature community packages for both React Native and Flutter. The caveats: very new iOS/Android APIs may not have community packages yet (weeks-to-months lag behind native), and some highly specialised hardware SDKs (industrial scanner APIs, proprietary device firmware) require custom native module development. ClickMasters writes custom native modules when required functionality is not available in the community ecosystem.
How long does cross-platform app development take?
A cross-platform MVP takes 8-12 weeks. A full-featured consumer cross-platform app takes 10-16 weeks. An enterprise cross-platform app with offline-first and SSO takes 10-16 weeks. Cross-platform is typically 4-6 weeks faster than building the equivalent app natively for both iOS and Android (because one codebase replaces two). The primary timeline factors are: number of screens and user flows, native module requirements (custom native bridges add 3-6 weeks), offline-first data complexity, and whether in-app purchases are required (StoreKit + Google Play Billing configuration adds 1-2 weeks). ClickMasters distributes to both TestFlight and Play Store internal testing after each 2-week sprint.
Should I build a cross-platform app or a PWA?
A Progressive Web App (PWA) is appropriate when: your app is primarily content display or simple interactions, native hardware access (camera beyond basic, Bluetooth, NFC on iOS) is not required, App Store distribution is not important, and your existing web development team can build it without a separate mobile development engagement. A cross-platform app (React Native or Flutter) is better when: you need App Store and Google Play distribution for discoverability and install trust, push notifications on iOS (PWA push is limited to iOS 16.4+ installed from home screen), Bluetooth or NFC hardware integration, richer offline capabilities with local database sync, or a more polished native-feeling UX than a PWA can deliver.
Do both iOS and Android apps use the same codebase in React Native?
Yes approximately 75-90% of the codebase is shared. The shared code includes: all business logic (API calls, state management, data models, validation), most UI components (screens, forms, lists, navigation structure), Firebase integration, analytics, and error tracking. Platform-specific code (10-25%) covers: navigation gesture UX (iOS swipe-back vs. Android back button), permission dialog copy and timing, push notification permission flow, biometric authentication prompt, platform-specific native modules, App Store vs. Google Play in-app purchase configuration, and store submission assets. React Native uses Platform.OS checks and platform-specific file extensions (.ios.ts and .android.ts) to manage the platform-specific portions cleanly within one repository.
