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# NSNearbyInteractionAllowOnceUsageDescription

A one-time request for user permission to begin an interaction session with nearby devices.

## Discussion

> Warning:
> Define this property in the `Info.plist` only for apps that deploy to iOS 14. ``doc://com.apple.bundleresources/documentation/BundleResources/Information-Property-List/NSNearbyInteractionUsageDescription`` replaces this property in iOS 15 and later.

Before an app starts an interaction session, the system requests permission to share the user’s relative distance and direction with a nearby peer. The framework presents a prompt that displays the value of this key contained in your project’s `Info.plist`. Define text that explains your interaction session’s purpose to the user. For more information, see <doc://com.apple.documentation/documentation/NearbyInteraction/initiating-and-maintaining-a-session>.

---

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