concur_clover114 Novalissoide hmm.... sadly not an editor though. Can't comment, highlight, underline, annotate, etc.. I found this btw: Readest. Currently looking into it.
Novalissoide concur_clover114 tried it and yes, no current editor. I've used it for extraction and converting so I've not noticed it. Well, it has its uses after all. And it seems like in pretty early development.
koocmit concur_clover114 onlyoffice allows editing PDFs decently as far as I have used it. You can use it without network permission and with limited storage scope if you are fine with installing it. That along with image Toolbox solves almost all of my PDF problems.