Drew this on my trusty* HTC One M8 using Corel Painter Mobile on the train home from a secret project.
(Status update: still don't have either a Summer of Love or the all important limited edition Summer of Hate jar. Hope lovely Internet friends are looking out for the latter jar as its the far rarer one).
*Trusty as it's been my daily use phone for yonks, hence a couple of battle scars and so on on the outer casing. That said I've had a few odd quirks recently which are strange and make me wonder... Hope it's ok (can't afford a new one at mo).
Corel Painter is an odd app. I like it, it's very snappy and speedy but it suffers a little from the 'one fabulous brush and the rest of them' that a number of apps struggle with (also the colour picker is in a very obtuse place and it does not deal with low storage space on a device well at all). The oddest thing about the app is that when I'm using it my pictures all lean to the left (a common problem for right handed artists... But one I don't seem to have on other apps. Very strange).
The lean is fixable, of course. It's one of the things I teach when I'm going through Photoshop for example. But Snapseed does a very good (although not perfect) job and I do love to keep it in tablet when I can.