Every app project starts with the same question: should we build two native apps – one in Kotlin for Android and one in Swift for iOS – or one cross-platform app with Flutter or React Native that runs on both? The answer affects your budget, your timeline and how easy the app will be to maintain for years.
What "native" means
A native app is written in the platform's own language and toolkit: Kotlin with Jetpack Compose on Android, Swift with SwiftUI on iOS. You get direct access to every operating-system feature on day one, the best possible performance and an interface that feels 100% at home on each platform.
The trade-off is simple: you build and maintain two codebases. Every feature, bug fix and design change is done twice, usually by two specialised developers.
What "cross-platform" means
With cross-platform frameworks you write the app once and ship it to Android and iOS:
- Flutter (Dart, by Google) draws its own UI, so the app looks identical on every device and custom designs are easy.
- React Native (TypeScript, by Meta) uses native UI components and is a natural fit for teams that already build web apps with React.
- Kotlin Multiplatform shares business logic but keeps native user interfaces.
Typically 80–95% of the code is shared, which shortens development and simplifies maintenance.
Side-by-side comparison
| Criteria | Native | Cross-platform |
|---|---|---|
| Performance | Best possible | Excellent for most business apps |
| Time to market | Longer (two apps) | Shorter (one codebase) |
| Budget | Higher | Usually lower |
| New OS features | Available immediately | Sometimes slightly delayed |
| Hardware-heavy features | Ideal | Possible, may need native modules |
| Long-term maintenance | Two teams/codebases | One team/codebase |
When we recommend native
- Apps that depend on intensive hardware access: Bluetooth medical devices, advanced camera pipelines, AR, complex background processing.
- Performance-critical apps such as real-time audio/video editing or 3D.
- Products that must use brand-new OS features at launch (for example new widgets or Apple Watch complications).
- You only need one platform – for example an internal Android app for warehouse scanners.
When we recommend cross-platform
- Most business apps: booking, e-commerce, loyalty, field-service, education, fintech front-ends.
- MVPs and start-ups that need to reach Android and iOS users quickly and validate the idea.
- Apps with a strong custom brand design (Flutter shines here).
- Teams that want one roadmap and one release cycle.
A practical middle way
It is not all-or-nothing. A Flutter or React Native app can include native modules for one demanding feature, and Kotlin Multiplatform lets you share logic while keeping native screens. We often start cross-platform and add native code only where it measurably helps.
How we decide with you
In the discovery phase we list your features, check the hardware and integration requirements, look at your target group (in Germany Android has the larger share, iOS users often spend more) and estimate both options. You get a clear recommendation with the reasoning – not a technology preference.
Bottom line: for the majority of companies, cross-platform delivers the best value. Native remains the right choice when performance or deep device integration is the core of the product.