I remember giving up on Krita half a year back, because it's incredibly laggy on Atom system (which is my on the go device). Even on my stronger machines (HP 612 G1 and HP 2760p), drawing still feel slow and unatural (you can see line is catching up on the pen tip ). I know both of them only have integrated Intel HD Graphic, but most modern art software doesn't (and shouldn't ) require a dedicated GPU to run. Clip Studio is just as (if not more) full featured and it run buttery smooth on last gen Atom chip with 2G RAM if not for little hiccup when saving. Granted Krita is free, but it just seem too resource hungry to work on. So far, I find Clip Studio is the most satisfying to draw with all kind of device, Medibang is a less smooth and not as fast but tolerable, but I couldn't really draw anything on Krita with how lag it was.