On my older Galaxy 10.1 2 the brush paints a bit lsower than on more modern, faster tablet, but still I get along, getting used to it. The nice thing is that the brush paints nevertheless smooth curves when I want that, it doe snot break them up in small linear pieces.
These are some pics to illustrate what the
specific Android version of ArtRage can do in the hands of a professional painter. All from Artrage homepage. - Don't call it a toy, don't say this app is not capable of truly amazing things! And it handles so easily.
And these galleries are the easiest way to see illustrations of the interface, on a cellphone display. Of course, tablet I would recommend. Their specs say it is for Galaxy 4 and higher, but as I said, when accepting that the colour does its magic on the "paper" a bit slower, I can make full and enjoyable use of it on my older Galaxy 10.1 2 , too.
http://www.artrage.com/artrage-android/samples/
Inbuild is the feature from PC to have an original (photo, lets say) "under" you canvas, you can define the opacity, and then you can easily trace trace it, like you would do a first sketch with coal before you actually start with the colours, to do a first draft of the painting, its contours and objects. Brushes can stay dirty, if you want, and in the tracing mode you can set them to automatically pick the colour under them from the original, when you touch the screen.
I hate that I am not more skilled and trained in painting. Actually, I am not a good painter at all, but this thing makes me wanting to be a more gifted talent.