Choosing how to build a mobile app is one of the earliest technical decisions you will make, and one of the hardest to reverse. The good news is that every mainstream option is mature. The question is which one fits your product, team and roadmap.
The three main options
Native: Swift for iOS, Kotlin for Android
Two codebases, each using the platform’s own language and tools. You get immediate access to new platform features, the best performance for demanding apps, and interfaces that feel completely at home on each device. The cost is building and maintaining most features twice.
Flutter
One codebase in Dart that renders its own interface on both platforms. Flutter is strong for brand-led designs that should look identical everywhere, and its hot reload makes iteration fast. Platform-specific features are reached through plugins or small amounts of native code.
React Native
One codebase in JavaScript or TypeScript that drives native interface components. It is a natural fit if your team already builds with React on the web, and it lets you share business logic, and sometimes code, with your web app.
Questions that should decide it
- How platform-specific is the app? Heavy use of the camera, Bluetooth, background processing, widgets or wearables tilts towards native.
- How important is time to market? A single cross-platform codebase usually ships to both stores sooner.
- Who will maintain it? Pick a stack your team, or your partner’s team, can support for years, not just build once.
- Do you have a web app too? React Native can share logic and talent with a React web front end.
- How custom is the design? Highly custom, animated interfaces are a Flutter strength.
A quick decision guide
- Content, commerce, booking and internal business apps: cross-platform is usually the efficient choice.
- Apps built around device hardware, real-time media or heavy offline processing: consider native.
- An MVP to test demand on both platforms: cross-platform, with a plan to add native modules where needed.
The framework matters less than the architecture. Clean separation between interface, business logic and data keeps future changes, including a change of framework, manageable.
Whichever route you choose, budget for testing on real devices, accessibility, analytics and the release process for both stores. Those costs are similar whatever the codebase looks like.
