# expo

> Expo apps: rules for public environment variables and DOM exports, and Expo's own project and SDK checks. The React Native configuration adds the component and style rules.

Expo apps: rules for public environment variables and DOM exports, and Expo’s own project and SDK checks. The React Native configuration adds the component and style rules. It requires [`react-native`](/reference/configurations/react-native/).

## Checks

| Check                                                     | Stage  | Level         | What it does                                                     |
| --------------------------------------------------------- | ------ | ------------- | ---------------------------------------------------------------- |
| [`expo/expo-doctor`](/reference/checks/expo/expo-doctor/) | `push` | `recommended` | Runs Expo Doctor and reports each failed check with its details. |

## Selected when

gspot selects it in a scope with dependencies `expo`.

## Tools and versions

| Tool               | Version  |
| ------------------ | -------- |
| eslint-plugin-expo | `1.1.0`  |
| expo-doctor        | `1.20.4` |