Digital Zettelkasten 101, aka My Second Great Markdown Editor Contest

Edit: I found out that both Blockquote and 1Writer support <mark>highlight</mark>.



Recently I have been reading about this thing called Zettelkasten. Obviously, a huge point of doing Zettelkasten is to use real paper cards, to not search, and to use the advantage of human brain to find order from chaos.
I almost bought some paper cards to try it out. But I thought better. I have been on the quest to de-paper-ise everything for four years now, and Zettelkasten, no matter how captivating, should not be the trigger that I introduce more paper into my life.
Therefore, I must find a way to practice Zettelkasten on all my preferred platforms (iOS & macOS) which is the only way to give it an honest try, which turned out to be much trickier than I thought.

The problem is, I already have a collection of close to 3000 markdown files, part of which was converted from my entire Evernote backlog, and the rest were notes that I created after that. Plus, they are stored in my iCloud, so that I can add, view and edit on the go. Therefore, if I am to choose a Zettelkasten tool, it must be compatible with all these. That means it should support Open in Place (also for macOS in some sense), at least some variant of markdown, preferably footnote and LaTeX, as well as all those Zettelkasten funcionalities (internal/wiki link, tag, etc).

iOS

There are surprisingly few valid candidates on iOS. Drafts could have been a great option, which recently added internal links support, but it does not support Open in Place, which is the prime reason that has stopped me from making it my main text editor on iOS.
Ulysses has the same problems as Drafts. Also, I don't think that subscription (a quite expensive one) is the best pricing model for text editors.
iA Writer does not support internal links. As well as ‎MDNotes, Edidown, and many other good editors on iOS.

Before this experiment, my beloved markdown editor is Blockquote, who won my previous iOS markdown editor contest (not documented) against the other finalist, Pretext, for outstanding editor/preview panels. And before that, I was using Joplin, who converted my Evernote backlog for me.

In the end, I landed on 1Writer, on which Federico's great experiments certainly helped a lot (who has since moved on to iA Writer). If you know me, well, you saw this coming: I have built a test file that includes all markdown functions that I may or may not ever need, and opened it in both 1Writer and Blockquote. You can find the source file here, and this is a side-by-side screenshot (left: 1Writer, right: Blockquote, both in iPad portrait mode):


macOS

There seem to be may candidates on macOS, but none of them is perfect. Therefore, I (again) have to trade-off among features that I absolutely want.
I have been using Typora for long (as you will see in the summary, I use it as the benchmark editor). However, it does not support Zettelkasten links or tags.
After some searching, I found Zettlr, which is also cross-platform & open. However, I don't really prefer it over Typora, and, although print kind of does the job, there is no real quick preview functionality in Zettlr. My quest continues.

Purely out of coincidence, one of the bloggers that I follow introduced this new cross-platform programme some day: Obsidian 未来的笔记应用 | Verne in GitHub. Obviously, I got excited, and joined the Obsidian beta.
Here is a Reddit thread for those who cannot read Chinese: Obsidian - take great notes in Markdown and let your knowledge outlive you : r/SideProject and the official roadmap: Obsidian Roadmap | Trello
Obsidian is almost perfect an editor. It is not WYSIWYG like Typora, but the optional side-by-side preview panel scrolls in sync (most of the time). It supports almost infinite split view (see the screenshot below). It even has a ramdom note switcher, which I believe will help with the Zettelkasten method. However, it does not export, or print, or anything that gets the markdown file into another form.
You can get my theme here: loikein/Dracula-for-Obsidian: A dark theme for Obsidian.md. I did not modify the dark theme that I forked from, only the light theme that I actually want to use.


PS: If you cannot compile PDF in Zettlr, in RStudio, or any LaTeX file really, try this command in the terminal: (Source: r - undefined control sequence in Rmarkdown - Stack Overflow)
$ fmtutil-sys --all

Summary

(*): No tag support for external (Open-in-Place-ed) files
(†): Only block LaTeX
(‡): Only inline LaTeX
(§): Using .cls (tedious LaTeX style files)

1Writer Blockquote Obsidian
(0.6.0)
Zettlr iA Writer
(macOS)
Benchmark:
Typora
Metadata
(When exporting)
Yes No No export Yes Yes Yes
LaTeX No Yes Yes (†) Yes (‡) Yes Yes
TOC Yes No No Yes Yes Yes
Internal Link Yes No Yes Yes No No
Tags No (*) No Yes Yes Yes No
Table Yes Yes Yes Yes Yes Yes
Highlight No No Yes Yes Yes Yes
Mermaid No No No Yes No Yes
Footnote Yes No Yes Yes Yes Yes
Custom Theme /
Editor CSS
No No Yes Yes No Yes
Custom Export
Template
No No No export Yes (§) Yes No

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