I'm so annoyed with myself for not giving Excalidraw more of a try. When I first installed Obsidian it was one of the plugins I tried out, but for some reason didn't end up using it. I had a Galaxy Note, but I never thought to install the plugin on the phone, I just assumed that it'd be a little janky.
Recently however I was looking for a cross-platform handwritten notes app that would work with my iPad w/ Apple Pencil and Galaxy Note w/ S-Pen... low and behold after trying all these other apps I remembered Excalidraw and decided to see what it was like. Holy crap, how did I miss this? Under my nose the whole time.