I'm tweaking them on a big Samsung S7 tablet, using Snapseed, Infinite Painter, Chroma Lab, Mirror Lab, and Cartoon Pro - I have other apps but always seem to use those because they are my favourites.

With Apple, I think Google and Microsoft are every bit as evil, but Apple pretend to be good. And I can get all software for microsoft free because it's all pirated, and Android nearly is free - the dearest of those apps cost about $10 for a pro version. I do use Linux (Mint) too, but for art, Android on a tablet is fast and intuitive.