Syncthing is free, open source software that can be used to easily synchronize an Obsidian vault between your computer and phone/tablet. Not only free, but completely secure, private, and blazing fast. Here are links to an article I wrote explaining how to use it.
- Biscotty’s Workshop not mobile friendly :-(
- Substack
- Medium.com
There are many ways. Git based solutions, or any repo based solutions,don’t give instantaneous synchronization though.
They do if your repo is on github
But that’s the point. In device to device sync there’s no repository.