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# ARFaceTrackingConfiguration

A configuration that tracks facial movement and expressions using the front camera.

```
class ARFaceTrackingConfiguration
```

## Overview

A face-tracking configuration detects faces within 3 meters of the device’s front camera. When ARKit detects a face, it creates an [`ARFaceAnchor`](/documentation/ARKit/ARFaceAnchor) object that provides information about a person’s facial position, orientation, topology, and expressions.

Face tracking supports devices with Apple Neural Engine in iOS 14 and iPadOS 14 and requires a device with a TrueDepth camera on iOS 13 and iPadOS 13 and earlier. To determine whether the device supports face tracking, call [`isSupported`](/documentation/ARKit/ARConfiguration/isSupported) on [`ARFaceTrackingConfiguration`](/documentation/ARKit/ARFaceTrackingConfiguration) before attempting to use this configuration.

When you enable the [`isLightEstimationEnabled`](/documentation/ARKit/ARConfiguration/isLightEstimationEnabled) setting, a face-tracking configuration estimates directional and environmental lighting (an [`ARDirectionalLightEstimate`](/documentation/ARKit/ARDirectionalLightEstimate) object) by referring to the detected face as a light probe.

> Note:
> Because face tracking provides your app with personal facial information, your app must include a privacy policy describing to users how you intend to use face tracking and face data. For details, see the [Apple Developer Program License Agreement](https://developer.apple.com/terms/).

## Topics

### Creating a Configuration

[`init()`](/documentation/ARKit/ARFaceTrackingConfiguration/init())

Creates a new face-tracking configuration.

[`new`](/documentation/ARKit/ARFaceTrackingConfiguration/new)

Allocates and initializes a new face-tracking configuration.

### Enabling World Tracking

[`supportsWorldTracking`](/documentation/ARKit/ARFaceTrackingConfiguration/supportsWorldTracking)

A Boolean value that indicates whether the iOS device supports tracking the user’s facial features in a world-tracking session.

[`isWorldTrackingEnabled`](/documentation/ARKit/ARFaceTrackingConfiguration/isWorldTrackingEnabled)

A Boolean value that instructs a session to provide the app with the device’s six degrees of freedom pose during a face-tracking session.

### Tracking Multiple Faces

[`maximumNumberOfTrackedFaces`](/documentation/ARKit/ARFaceTrackingConfiguration/maximumNumberOfTrackedFaces)

The number of faces to track during the session.

[`supportedNumberOfTrackedFaces`](/documentation/ARKit/ARFaceTrackingConfiguration/supportedNumberOfTrackedFaces)

The maximum number of faces that the framework can track.


---

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