Just in case you thought that the built-in Augmented Reality functionality that ARKit has to offer wasn’t amazing enough, you won’t believe what you can do with face tracking and facial expression detection. By using the front-facing camera, it can track multiple faces and even the expressions on them.
Tracking Faces
Out of the box ARKit gives us the ability to track up to three different faces in a scene. To be clear, that means detecting faces and following them around the scene.