The Flutter-versus-native debate is usually answered with dogma. The honest answer is that it depends on the product, and the decision is more about cost and constraints than about which framework is "better." Here's how we decide at Ryza Dev.

The default: Flutter for both platforms

If an app needs to run on both Android and iOS, and the UI is largely custom, we default to Flutter. One codebase means one set of features, one set of bugs to fix and roughly half the delivery time versus maintaining two native codebases. Modern Flutter renders at native frame rates and ships a consistent look across both platforms without a web-view compromise.

When native Android wins

We go native in Kotlin when the app leans hard on platform-specific behaviour:

  • Deep integration with Android system APIs — VpnService, foreground services, accessibility, device admin.
  • Background work the OS treats specially, like long-running connections or precise scheduling.
  • A Play-only release where the tightest binary size and startup time matter.
  • Heavy on-device ML or audio/video processing where you want direct control over the native toolchain.

When native iOS wins

Similarly for Swift: widgets, Watch/HealthKit integration, and features that depend on the newest iOS frameworks before cross-platform plugins catch up. If a product's core value is an iOS-only capability, native is the right call.

The hybrid approach we use most

The best of both, and the pattern we reach for with complex products: build the whole app in Flutter, then drop to native code only for the specific features that need it — through platform channels or FFI. A VPN app is a good example: the UI and business logic live in Flutter, while the tunnel is native Kotlin. You get cross-platform speed without hitting a ceiling.

Our rule: Flutter by default; native when a feature genuinely depends on the platform; and a hybrid when one or two features do.

What actually drives the decision

  • Platforms needed — both, or one?
  • Depth of native integration — stock UI, or system-level APIs?
  • Team and budget — can you afford two native codebases and two roadmaps?
  • Timeline — one codebase ships faster; that's usually decisive.

The bottom line

Flutter is the right default for most apps that live on both platforms. Native wins when the product depends on platform-specific power, and a hybrid resolves the cases in between. The wrong choice is picking a framework by rumour. Pick it by what the product has to do — then commit to the architecture so the choice doesn't haunt you later.