Yet another app
Today I came across Boostnote (https://boostnote.io). A cute app for organising notes in text files.
It looks quite close to Bear Writer but sports some additions I like like preview of markdown and more way to organise notes.
If you want to set up a Zettelkasten just on your desktop give it a try. The iOS up seems to be down for the moment :-(
Currently I'm still using The Archive on a regular basis for my Zettelkasten. But I'm tempted to move to Boostnote once it sports an iOS app again. It's text based but at the same time "higher fidelity".
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