Hey, we're most of the creators of A-Painter (along with Fernando Serrano from Mozilla). If you like A-Painter, check out what we're doing now with Supermedium (YC W18), a full VR browser. We're featuring A-Painter there, and may do more cool things with it! https://store.steampowered.com/app/803010/Supermedium__Virtu...

A-Painter is great and was probably the inspiration behind several iOS AR apps like Paint Space AR (https://itunes.apple.com/us/app/paint-space-ar/id1260267722), Draw AR (https://itunes.apple.com/us/app/world-brush/id1255729229) and World Brush (https://itunes.apple.com/us/app/world-brush/id1277410449).