Anyone working on an importer for Apple iOS Journal?

If it's generic HTML, you could unzip and try:

  • The builtin HTML import File -> Import -> HTML. I'm just not sure if the note is editable afterwards.
  • Pandoc or jimmy (which is essentially a wrapper around Pandoc) to convert to Markdown and then import to Joplin.

If it's "custom" HTML, I think there isn't an import tool, yet. At least I didn't find anything on the wiki page: