I use a mix of apps but these days use mostly Deneba artWORKS, which is essentially an enhanced UltraPaint or a cutdown Canvas 3.x depending on your point of view. Their plugins can all be shared. I have another blog post about that. https://blog.gingerbeardman.com/2021/04/25/mixing-external-t...
Thanks for the link. I never used MacOS back in the day, but it looks beautiful running on the iPad. I used iPads from the first to the 2017 Pro model as my primary computers on the go, but the lack of a terminal and Unix tools (zsh, rsync, openssh) did them in for me. I miss the the Apple Pencil, which I found fantastic for drawing.
Do you have any videos of you drawing on the iPad in artWORKS or UltraPaint? Would love to see it, since I don't have an iPad to try it on.