---
title: "isDefault(_:)"
framework: uikit
role: symbol
role_heading: Instance Method
path: "uikit/uiapplication/isdefault(_:)"
---

# isDefault(_:)

Reports whether this app is the person’s default app in the given category.

## Declaration

```swift
nonisolated func isDefault(_ category: UIApplication.Category) throws -> Bool
```

## Parameters

- `category`: The type of app for which you test whether your app is the default.

## Return Value

Return Value If the system determines the status of the app, this method returns true if the app is the default app in the category, and false otherwise. If the system doesn’t determine the status, or the app exceeds the threshold rate for calling this method, it throws an error.

## Discussion

Discussion To reduce the likelihood that users face continuous requests to set a browser as their default, this API only tells the browser app if it’s the default up to four times in a year. If you call the method too frequently, it throws an error with the domain UIApplicationCategoryDefaultErrorDomain and the code rateLimited. The error’s user information dictionary contains these keys:

## See Also

### Discovering if your app is the default app in a category

- [UIApplication.Category](uikit/uiapplication/category.md)
- [UIApplication.CategoryDefaultError](uikit/uiapplication/categorydefaulterror.md)