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# ActionButton

A user-interface element that enables a person to install, update, or launch apps by tapping the element.

```
@MainActor @objc @preconcurrency class ActionButton
```

## Overview

iOS doesn’t allow an app marketplace to install apps without a person’s consent. When iOS receives a request to install an app, it validates that request came from a user interaction with this button. If instead, a marketplace calls the [`AppLibrary`](/documentation/MarketplaceKit/AppLibrary) installation methods directly, the call may fail.

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