Like, a completely handmade app for general journaling, or an advanced reference system for the archival of generative materials? I had the idea to make the latter, however I would need to figure out how to work with Swift Data and state bindings first.
I need to make some sort of custom logging program, like an offline blog for just me...
but like also super custom looking because its just for me
Consider checking out Apple’s official journaling app. It supports basic formatting (BiUs) & images and some other things at the top of entries. It's slightly fancier than a plain text, but not much fancier than that.
See if it satisfies your needs: https://apps.apple.com/us/app/journal/id6447391597