Thanks to the TrueDepth camera featured on the iPhone X, iPhone XS, iPhone XS Max, iPhone XR, and iPad Pro, ARKit face tracking now supports up to three faces at once for front-facing apps such as Memoji and Snapchat. Speaking of cameras, ARKit 3 allows for simultaneous use of the back and front cameras, opening up the potential for unique experiences where AR content projected via the back camera can be affected using facial expressions captured via the front camera; imagine an AR character who can identify and respond to the emotions of a user, or an AR game controlled entirely by facial expressions.
For those interested in taking advantage of ARKit 3's exciting possibilities, Apple has announced RealityKit, a high-level framework built specifically to assist less-seasoned developers with creating AR experiences on the iOS platform. RealityKit offers a variety of AR-based services, including photo-realistic rendering, multiple camera effects, various animations, advanced physics, and a Swift API
. RealityKit even assists with networking during multiplayer experiences and features automatic scalable performance for all compatible iOS devices, meaning any experience you build on the iPhone will work on the iPad.