---
title: fallbackURL
framework: groupactivities
role: symbol
role_heading: Instance Property
path: groupactivities/groupactivitymetadata/fallbackurl
---

# fallbackURL

A URL that offers participants a way to identify or join the activity from a web browser.

## Declaration

```swift
var fallbackURL: URL?
```

## Discussion

Discussion Use this property to provide fallback behavior for users who don’t have your app installed on their device. For example, if your app runs only on iOS, use this property to supply activity-related information for users on a Mac. When your app isn’t available, the system opens the specified URL in Safari. important: Make sure that the URL in this property eventually leads to a webpage with the same content as the activity. Safari automatically synchronizes media playback for listen-together and watch-together experiences.

## See Also

### Presenting the activity

- [title](groupactivities/groupactivitymetadata/title.md)
- [subtitle](groupactivities/groupactivitymetadata/subtitle.md)
- [previewImage](groupactivities/groupactivitymetadata/previewimage.md)