I've tried using Notability but it's borderline unusable if you don't pay for it. I don't see myself taking notes on my iPad anytime soon so I'd rather not spend money on an app like GoodNotes (yet). I'm just looking for a free app that lets me annotate PDFs and make comments and all that, preferably with a good UI and tab support, since I find myself jumping between various files. I've tried using the built-in one in OneDrive but it doesn't have tab support and the handwriting kind of feels off. Thanks in advance!