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title: Module Config
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> **warning** Expo Modules APIs are in beta and subject to breaking changes.

Expo modules are configured in **expo-module.config.json**. This file currently is capable of configuring autolinking and module registration. The following properties are available:

- `platforms` — An array of supported platforms.
- `ios` — Config with options specific to iOS platform
  - `modules` — Names of Swift native modules classes to put to the generated modules provider file.
  - `appDelegateSubscribers` — Names of Swift classes that hooks into `ExpoAppDelegate` to receive AppDelegate life-cycle events.
- `android` — Config with options specific to Android platform
  - `modules` — Full names (package + class name) of Kotlin native modules classes to put to the generated package provider file.