Yeah i was a happy zim user but kept hitting the wall that zim is clearly designed for the desktop. While i don't take as many notes on mobile as I do on desktop, i still have the need for mobile notes...and zim fell short. I know there are alternative methods where some folks use zim on their desktop and then for mobile leverage dropbox - both for synching the zim files and using dropbox's text editor (such as it is). but this mode left me wanting more. I really loved zim, but lately i've been using the notes app on self-hosted nextcloud - which is synched to my desktops via nextcloud's sync client. I'm only a few weeks into this experiment, but so far, so good. I think the day that zim moves into territory where it is more easily workable on mobile, is when it will be a top dog for note-taking platforms.