Artopia is an upcoming Android and iOS augmented reality and location-based app that lets you paint in 3D in mid-air. Your phone’s a paintbrush and your surroundings are your canvas. Everything you draw is saved in the world for others to find. Step 1: Head to a place you like Step 2: Start painting! Your painting becomes saved and will stay wherever you drew it, and anyone passing by can admire it in its full 3D splendor.
