# Expo Brownfield

> Embed Expo in an existing Swift or Kotlin app

**Subcategory:** Expo  
**License:** MIT  
**Source:** https://github.com/expo/skills/blob/main/plugins/expo/skills/expo-brownfield/SKILL.md

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## When it is useful

Integrate Expo and React Native into an existing native iOS or Android app. Use when the user mentions brownfield, embedding React Native in a native app, AAR/XCFramework, or adding Expo to an existing Kotlin/Swift project. Covers both the isolated approach and the integrated approach.

## The Catch

embed-in-existing-native only; dead on greenfield Expo.