I use markor (https://f-droid.org/en/packages/net.gsantner.markor/) on android and it does everything I need. It's all a bunch of files, synchronized with syncthing, so I can use it on my desktop with any editor (maybe https://thiefmd.com/, maybe another one). No need for a server, I can use it while offline, it's lightweight to install and maintain.
I use markor (https://f-droid.org/en/packages/net.gsantner.markor/) on android and it does everything I need. It's all a bunch of files, synchronized with syncthing, so I can use it on my desktop with any editor (maybe https://thiefmd.com/, maybe another one). No need for a server, I can use it while offline, it's lightweight to install and maintain.