You don’t need a new app for your Zettelkasten
You don’t need a new app for your Zettelkasten. You already have all the programmes you need to make a Zettelkasten on your computer.
- use vim
- use the shell (the terminal) as an interface; if you are new to the command line see https://yctct.com/cli
- use a vim plugging to link files; search the web for “vim zettelkasten”