Joplin cloud. I use it on Linux, a de-googled Android phone, and an iPad. It's very reliable in general. Sometimes the iPad won't sync automatically. Then if you manually sync you loose anything added on the other devices in the meanwhile. If you move between devices a lot there's the chance of not noticing until you notice missing items on another device. That's when history saves you. You can duplicate the out of sync note. Then roll back the original. Copy/paste from the duplicate to fix.