https://techcrunch.com/2018/05/30/google-builds-its-cross-platform-multiplayer-ar-tech-into-a-doodling-app/

At Google I/O earlier this month, the company announced Cloud Anchors, a tool that shares 3D data captured by a user’s smartphone with the cloud and can match that data up with another user to create a shared AR experience where each person’s phone is seeing the same things in the same places.

Today, Google is rolling out Cloud Anchor functionality to its AR drawing app called Just a Line which it released a couple months ago. Just a Line is hardly a breakout hit for Google, but the simplistic app that lets users paint the 3D world with a white line offers a nice testbed for early AR functionality that’s just as experimental.