I have iOS, and use MacBook/Linux.
EDIT: Wow! It’s impressive how many different ways there are to achieve this. I tried obsidian git, but couldn’t get it to work as expected. Remotely Save is working perfect! Obsidian flew under my radar all these days because I thought sync was the only way. I’m looking into plugins and there’s literally a thousand plugins. It’s kinda overwhelming tbh. I’ll make another post for plug-in recommendations and workflow setup advice. Thank you all!
I purchased sync. I agree it is a little on the expensive side.
The one thing you can do is just use git and turn on the push and pull. It seems to be very reliable this way. Though you won’t be able to use it on the phone as far as I have been able to figure out.