Google has announced their experimental augmented reality app, Just a Line, now allows users to draw with a friend on both Android and now iOS.
To do this, all you need is to put two phone side-by-side and tap the partner icon and once the app connects the two phones, you and your friend will be able to see and draw together.
This feature uses ARCore 1.2 which has something Google calls Cloud Anchors. Drawings from both devices are continuously synced and accessed from a shared Firebase Realtime Database, which allows for the same interactive image to be viewed across two devices.
Google’s Just a Line app is the world’s first cross-platform collaborative augmented reality app.
Google also released the open-source code for the Android and iOS versions of the app, so developers can build their own shared AR experiences.