As I see the Markdown editor is a class of editors to make files with .md extension. Quicknote looks similar. I use Obsidian on my PC with the same md-files. But how can I use it with GrapheneOS? Just install one more app or texting in some cloud? I need save text in some default app to use it offline without any additional installing and access to web.
This kind of apps are base of any user friendly OS. Camera, gallery, pdf-viewer, calculator, clock/alarm clock - are already preinstalled. I'm asking about text editor/notepad and voice recorder. I hope it will be added in future, I hope asap.