I am using Joplin with syncthing. I don’t need online services for syncthing. My smartphone is the center of this synchronization of notes with three different pc in three different places (I do it with keepssxc database too). I just have to be a bit careful and so I check that the synchronization has been done before writing notes an another device. It’s a nice solution for me. The devices are an android smartphone, two linux laptops and a Windows pc. It works.
Ok. Thanks for the suggestion. I’ll look into it