ARKit Multiplayer

look for any Gamekit/multiplayer/bluetooth game.

arkit 3d game is just a normal 3d game with the background replaced with the view through the iphone camera.

And the camera in 3d space moves exactly with the phone.

the floor of the 3d game is an invisible floor mapped to the table or floor in real life.

So if you can add in Gamekit you got multiplayer

The main issue is making the game on one phone stay in sync on the other devices.

player A moves his player to position x,y,z in 3d space on device A.

sends move (A,x,y,z) over bluetooth to other players devices.

player A on other devices moves to x,y,z

now do that in 3d without lag.