Should I learn React Native or Java?

React Native uses the same fundamental UI building blocks as regular iOS and Android apps . You just put those building blocks together using JavaScript and React. React Native combines smoothly with components written in Objective-C, Java, or Swift.

Native is the preferred choice in most other cases . Having knowledge in the native language and the native APIs is needed when developing in React Native as well. This means that if you are a beginner it is strongly recommended to start by developing a native application.

With React Native, you create one codebase that works on both Android and iOS . And it doesn’t just “work”—it compiles to native Java and Swift code. Specifically, React Native creates a bridge between web UI components and their native Java/Swift counterparts.

Java and Kotlin have similar performance indications and are the best options for Android development. Native is 2 times faster then Flutter . React native is around 6 times slower than native.