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# Assistant

Enable people in Japan to launch your voice-based conversational app from the side button of iPhone.

## Discussion

The `.assistant` domain defines a single app intent schema, [`activate`](/documentation/AppIntents/AppSchema/AssistantIntent/activate), that registers your app as a side button action on iPhone.
This schema is available only in Japan.

> Tip: Xcode generates a template implementation when you type `assistant_` and select a schema from the suggestions list.

For more information about app schemas, see [App schema domains](/documentation/AppIntents/app-schema-domains).

## Topics

### Essentials

[Launching your voice-based conversational app from the side button of iPhone](/documentation/AppIntents/Launching-your-voice-based-conversational-app-from-the-side-button-of-iPhone)

Let people in Japan configure the side button of iPhone to launch your voice-based conversational app.

### Actions

[`var activate: some AppSchemaIntent`](/documentation/AppIntents/AppSchema/AssistantIntent/activate)

The app intent conforms to the schema for launching your voice-based conversational app from the side button on iPhone in Japan.

[`protocol AssistantIntent`](/documentation/AppIntents/AppSchema/AssistantIntent)

Assistant schema conformance for app intents that offer support for the side button on iPhone in Japan.


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