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# showSignificantUpdateAcknowledgment(in:updateDescription:)

Displays a system-provided interface for people to acknowledge a significant app update.

```
@MainActor func showSignificantUpdateAcknowledgment(in windowScene: UIWindowScene, updateDescription: String) async throws
```

## Parameters

`windowScene`

A window scene that presents the acknowledgment interface.

`updateDescription`

A clear description of what changed in your app and why acknowledgment is required.

## Discussion

Call this function to inform people that your app has undergone a significant change
that requires their acknowledgment. For more information on what constitutes a significant app change, refer to <doc://com.apple.documentation/documentation/PermissionKit/SignificantAppUpdateTopic>.

> Important: Before calling this function, check ``doc://com.apple.declaredagerange/documentation/DeclaredAgeRange/AgeRangeService/RegulatoryFeature``
> to determine if a person must acknowledge your significant app change.

> Throws: An error if the feature isn’t available.

---

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