react-native-dotenv is a Babel plugin that lets you import environment variables directly in your React Native code (e.g., `import {API_URL} from '@env'`) by loading values from `.env` files—including environment‑specific variants—so you can keep configuration out of your source and access it via `process.env` or the imported `@env` module. It’s aimed at React Native developers who need a simple, type‑agnostic way to manage app‑level configuration across development, staging, and production environments.