expo-brownfield

Integrating React Native into an existing native iOS app involves adding Expo and React Native directly to your CocoaPods build system or embedding a prebuilt XCFramework, enabling incremental feature adoption without rewriting the native codebase.

A brownfield mobile app integration with Expo is the process of incrementally introducing React Native features into an existing native iOS or Android codebase, rather than building a new app from scratch using Expo's managed workflow.

Yes, you can add Expo and React Native directly to your existing Android project's Gradle build system using the integrated approach, or you can build a prebuilt AAR and consume it from your native app using the isolated approach.

Yes, integrating Expo and React Native into an existing native app requires Node.js and Yarn to manage JavaScript dependencies and run the build scripts that generate the AAR or XCFramework for your project.

The isolated approach builds React Native as a prebuilt AAR or XCFramework consumed by your native app, while the integrated approach adds React Native and Expo directly into your existing native project's Gradle or CocoaPods build system.