Nextcloud Notes is my favorite note-taking app that allows me to sync notes across devices using my Nextcloud instance. I don’t like to limit my notes to just one computer, I need to be able to access them from anywhere, whether that’s my desktop computer, my laptop or my phone. And I choose a self-hosted Nextcloud, because then I can also choose any other file editor to edit the notes.
The Android app (free via F-Droid) also recently got a redesign and is now as beautiful as other note-taking apps.
My favorite feature is that I’m able to take notes in Markdown, even with code syntax highlighting.