I don't know if it can even really be said to be conceptually based on Harmony. They're certainly both drawing tools using Canvas, but that's like saying Photos

I don't know if it can even really be said to be conceptually based on Harmony. They're certainly both drawing tools using Canvas, but that's like saying Photoshop is based on MS Paint because they're both drawing tools on Windows. Harmony is all about the procedural generation of images by interaction with previously drawn points. dA muro doesn't really permit that at all... which is a shame, as that's a technique with really interesting applications