Could you elaborate on where exactly you save or store your entries to make them universally accessible? For instance, do you use a specific application or cloud storage service?
I use Nextcloud hosted on Hetzner. It is pretty cheap and supports almost all systems I can think of. It feels a bit sluggish at times (slow sync, apps can be buggy), but I'm pretty happy with it.
Oh and the mobile app has a decent editor for text / markdown files :)