Mobile app development: native vs. cross-platform (React Native)

When deciding on a mobile app, almost every company runs into the same question: native vs cross-platform. There's no universal answer – it depends on what the app needs to do, which devices people will use it on, and who will be developing it long-term. In this article, we look at three areas where native and cross-platform approaches genuinely differ: performance, access to device features, and maintenance overhead.

Native development means building two separate applications for iOS and Android, each in its own language with its own codebase – Swift or Objective-C for iOS, Kotlin or Java for Android. The app can then directly use the tools and libraries that Apple or Google, respectively, have built for that platform.

Cross-platform development, by contrast, is built on a single codebase that runs on both platforms. The best-known example is React Native, which uses JavaScript/TypeScript and renders components as native system elements at runtime. This means a large part of the logic, UI components, and business rules only needs to be written once.

For everyday applications – an internal business tool, an order management system, a client app with forms, lists and notifications – the performance difference between a native and a cross-platform solution is barely noticeable in practice. Since the introduction of React Native's new architecture (Fabric and TurboModules), the framework communicates with native layers more efficiently than earlier versions, narrowing the performance gap even further.

The difference shows up in more demanding scenarios: complex 3D graphics, real-time image or video processing, games, or apps that need to run smoothly even on older, less powerful devices. There, native code still offers more direct access to the hardware and fewer layers between the code and the operating system.

The second area where the paths diverge is working with native device features – camera, biometrics, Bluetooth, NFC, background tasks, push notifications, or deep integration with Apple Watch or Android Wear.

Common features (camera, GPS, notifications, biometric login) have solid, stable libraries in React Native, so in practice you won't notice any difference compared with native development. The issue arises with very specific or brand-new APIs that a platform has only just added – these reach cross-platform libraries with a delay, or require a custom native module built specifically for the purpose. In that case, the project effectively combines a cross-platform foundation with a native add-on for that particular feature.

This is the area where the cross-platform approach shows its strength the most. With native development, there are two separate codebases that need to be maintained in parallel – every change, bug fix, or new feature is implemented twice by the team, once for iOS and once for Android. This raises the demands on team coordination and the risk that the two platforms drift apart in functionality over time.

React Native lets you share most of the logic, UI, and tests across platforms. Fixes and new features are deployed simultaneously for iOS and Android, which reduces the room for inconsistencies between app versions. At the same time, bear in mind that a cross-platform framework depends on the pace of community updates and on third-party libraries staying compatible with new iOS and Android releases – this is an important factor to watch when planning long-term maintenance.

The chart illustrates the general principle – with native development, the codebase for iOS and Android is completely separate, while the cross-platform approach allows a significant share of code to be shared. The exact proportion varies from project to project, depending on how many native modules the app requires.

The choice between native development and React Native shouldn't be based on what's "more modern", but on the project's actual requirements.

Native development makes sense when:

• the app works intensively with graphics, real-time camera input, or heavy data processing,
• you need immediate access to the latest iOS or Android features without waiting for framework support,
• the app is the core of the product and performance is a key competitive factor (for example, games or AR apps).

React Native is a good choice when:

• it's a business or customer-facing app with standard functionality – orders, bookings, account management, notifications,
• keeping a single codebase and consistent development across both platforms matters,
• the app is part of a company's wider digital ecosystem (website, backend, app) and sharing logic between them reduces overall complexity.

This decision is also closely tied to what kind of software a company actually needs – we covered similar logic when comparing custom software and off-the-shelf SaaS solutions, where the same principle applies: choose the technology based on real requirements, not on trends.

Native vs cross-platform isn't a battle of "better versus worse" – it's a question of the right tool for a specific goal. For the vast majority of everyday business apps, React Native vs native development is settled in favour of the cross-platform approach, thanks to simpler maintenance and faster parallel development for both platforms. For apps with specific performance or hardware requirements, native development still has its place.

The factors that shape this decision – target audience, required device features, planned app lifespan, and internal capacity for ongoing development – differ from company to company. At INTERFASE we work on mobile app development with both technologies and can help you assess together which path fits your specific project. If you're considering a mobile app for your business, book a no-obligation consultation, where we'll go through the scope, features, and technology options.