I've been experimenting with Clip Studio Paint that's a full version, paid by monthly subscription, on the iPad Pro which is really amazing and useful. It's especially great now that Celsys has lowered the price of the iOS version so that it's more manageable for the budget and keep on using it. Lately, I was getting into the japanese oni demons and wanted to tinker around with the tools of CSP to see how I can work with the layers in order to observe how closely it behaves compared to the desktop version. Incredibly, it is literally the exact same thing and ports over native files well enough through Dropbox, in my case, however I found uploading the image to the CSP cloud via iPad Pro to the desktop a bit of a problem but I'm sure there's a way to do it on the Mac platform.
It is nearly completed as I've to fix a few areas before adding the text quote marks in the negative space and consider having it available as a printed piece, probably on Society6. I believe with more experience on this particular platform, it would make it easier to work around the UI and workflow process more seamlessly. I'm really liking CSP on mobile so far.