Building a mobile app for both iOS and Android used to mean maintaining two entirely separate codebases in two different programming languages. Cross-platform frameworks resolved that complexity, and in 2025, two frameworks dominate the landscape: React Native, created by Meta, and Flutter, created by Google. Choosing between them is less about which is objectively better and more about which fits your project, your team, and your existing technology stack.
React Native uses JavaScript and TypeScript to build native mobile applications. Its greatest strength lies in its home within the world's largest programming community — the JavaScript ecosystem — which means an enormous library of third-party packages on npm, a deep global hiring pool, and the ability to share business logic and some components between a React web application and a mobile app. React Native also offers hot reloading for instant feedback during development and access to platform-specific native modules when their capabilities are required. Its primary limitation is the JavaScript bridge: communication between the JavaScript layer and native platform code can introduce bottlenecks in animation-heavy or performance-critical applications, and managing complex sets of native dependencies can become unwieldy over time. React Native powers apps at Instagram, Facebook, Shopify, Bloomberg, and Discord, among many others.
Flutter, by contrast, uses the Dart programming language and runs on a custom rendering engine that draws its own UI components rather than wrapping native ones. This produces pixel-perfect, identical UI across iOS and Android and compiles to native ARM code with no JavaScript bridge — delivering excellent runtime performance. Flutter's widget library is rich and highly customizable out of the box, and the framework has been growing rapidly in developer adoption surveys year over year. Its limitations are notable, however: the Dart language has a smaller developer community than JavaScript, meaning the available hiring pool is narrower; Flutter apps tend to be larger in file size due to the bundled rendering engine; and if your web stack is already built on React and Next.js, Flutter introduces an entirely separate skillset with no pathway for code sharing between web and mobile. Flutter powers Google Pay, BMW, Alibaba, eBay, and Toyota applications, among others.
When comparing the two frameworks directly across the factors that matter most in practice: React Native uses JavaScript and TypeScript while Flutter uses Dart; Flutter's performance is generally excellent while React Native's is good and steadily improving; Flutter achieves pixel-perfect cross-platform consistency through its custom renderer while React Native uses native components that may vary slightly between platforms; React Native taps into the massive npm ecosystem while Flutter uses the growing pub.dev registry; React Native has a lower learning curve for any developer already familiar with JavaScript; and code sharing with a React web application is excellent with React Native but very limited with Flutter. App size tends to be smaller with React Native and larger with Flutter due to the bundled rendering engine.
At PROGREX, our default recommendation is React Native, because we use TypeScript across our entire stack — Next.js, Node.js, and mobile — enabling maximum code reuse between web and mobile products, a larger available hiring pool, and a single language for developers to work across multiple platforms simultaneously. We recommend Flutter when an app is primarily visual or animation-heavy, when pixel-perfect cross-platform consistency is critical and non-negotiable, or when the client has no existing React web codebase and the team already has Dart experience. The right choice always depends on your specific project, team, and business context — and at PROGREX, we take the time to evaluate those factors carefully before recommending a direction, rather than defaulting to whichever framework is currently generating more conference talks.
