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# NSWorldSensingUsageDescription

A message that tells people why the app is requesting access to image tracking, plane detection, or scene reconstruction.

## Discussion

Use this key to indicate that your app requires access to world-sensing data. This includes plane detection, image tracking, and scene-reconstruction anchors. The first time your app tries to access world-sensing data, the system prompts for permission. Provide a string for the prompt that explains why your app needs access. For more information on setting up ARKit for world sensing, see <doc://com.apple.documentation/documentation/visionOS/setting-up-access-to-arkit-data>.

> Note:
> World tracking — unlike world sensing — doesn’t require authorization. For more information, see <doc://com.apple.documentation/documentation/visionOS/tracking-points-in-world-space>.

---

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