In reply to Itsallsoannoying.

I’m not sure which version of iA Writer you used, but it’s one of the most open-format apps available. You can store and transfer your files in any way you prefer, making file transfer incredibly easy. You can use the internal library or add external folders, and you can open any Markdown file from anywhere.

At its core, it’s a document editor that adheres to the conventions used by other apps on Apple platforms.