# ARTrackable An interface for objects that track the location of real-world objects or locations. ``` protocol ARTrackable : NSObjectProtocol ``` ## Overview This protocol is adopted by ARKit classes, such as the [`ARFaceAnchor`](/documentation/ARKit/ARFaceAnchor) class, that represent moving objects in a scene. ARKit automatically manages representations of such objects in an active AR session, ensuring that changes in the real-world object’s position and orientation (the [`transform`](/documentation/ARKit/ARAnchor/transform) property for anchors) are reflected in corresponding ARKit objects. The [`isTracked`](/documentation/ARKit/ARTrackable/isTracked) property indicates whether the current transform is valid with respect to movement of the real-world object. Trackable anchor classes affect other ARKit behaviors: - The [`getCurrentWorldMap(completionHandler:)`](/documentation/ARKit/ARSession/getCurrentWorldMap(completionHandler:)) method automatically includes only non-trackable anchors in the [`ARWorldMap`](/documentation/ARKit/ARWorldMap) it creates. (After you create a world map, you can add other anchors to it if you choose.) - [`ARSCNView`](/documentation/ARKit/ARSCNView) and [`ARSKView`](/documentation/ARKit/ARSKView) automatically hide the nodes for anchors whose [`isTracked`](/documentation/ARKit/ARTrackable/isTracked) property is . - World-tracking sessions use non-trackable anchors to optimize tracking quality in the area around each anchor. Trackable anchors do not affect world tracking. ## Topics ### Monitoring Tracking State [`isTracked`](/documentation/ARKit/ARTrackable/isTracked) A Boolean value that indicates whether the object’s transform is valid. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)