The short version
Flutter and React Native are both mature, both ship apps used by very large audiences, and both build iOS and Android from one codebase. The choice is mostly about your team and your design.
React Native uses React and TypeScript and renders native platform components, so it suits teams that already build for the web with React. Flutter uses Dart and draws its own UI, so it suits apps that need a custom, consistent look and lots of motion.
Where Flutter wins
Pixel-consistent design. Because Flutter renders every pixel itself, a branded design looks the same on an older Android phone and the newest iPhone. Designers get what they drew.
Animation and custom graphics. The Impeller rendering engine, now the only renderer on iOS and the default on modern Android, handles complex animation and custom drawing smoothly.
Reach beyond phones. One Flutter project can target iOS, Android, web, Windows, macOS and Linux. For an app that also runs on a tablet kiosk or a desktop, that is useful.
Cohesive tooling. The SDK, widget library, hot reload and Widget Previewer come from one place, which makes setup predictable.
Where React Native wins
Team skills. If your developers know React, they are productive in React Native quickly. TypeScript types, validation and API clients can be shared with a React web app.
Native components. Lists, inputs and navigation use the platform’s own controls, so the app behaves the way users expect on each OS without extra work.
Expo. The React Native team recommends starting with a framework, and Expo is the common choice. It handles builds, file-based routing and over-the-air updates for JavaScript changes, which shortens the fix cycle.
Hiring and longevity. The React ecosystem is very large, so finding developers to maintain the app later is easier.
Modern core. The New Architecture is now the only architecture, and Hermes V1 is the default engine, which closed most of the old performance gaps for business apps.
What we recommend
If your company already has a React web app or React developers, use React Native with Expo. The shared skills and code save more than any framework difference costs.
If you are starting fresh and the app’s value depends on a distinctive, animated interface, or you need desktop targets too, Flutter is a strong choice.
Either way, most of the real cost and risk sits in the backend: APIs, integrations, authentication and any AI features. Keep model calls on your server, as described in connecting an LLM to internal data safely. Our tire warehouse ordering case study is an example where modernizing a legacy API was as important as the app itself. For budgets, see the mobile app cost page, or start here to talk through your project.