Animoji

Animoji are large animated emoji that are tracked to the motion of the user detected by TrueDepth cameras of certain Apple devices.

History
The first devices to support Animoji were the iPhone X and iPad Pro, both released in 2017 running iOS 11. In 2018, iOS 12 added support for Memoji, in which the Animoji could be customized to resemble the user or other characters.