fwiw, on mac/ios you can put your obsidian vault inside icloud directory and have a “free” cross-device sync feature.
notes()
{
if [ ! -z "$1" ]; then
mkdir -m 00750 -p /Users/User/iCloud/Documents/notes
Now=$(date '+%B %d %Y %H:%M')
echo -en "\n$Now\t$@\n" >> /Users/User/iCloud/Documents/notes/notes.txt
else
echo "${Now}"
cat /Users/User/iCloud/Documents/notes/notes.txt 2>/dev/null
fi
} function nod { mg +-1 "/home/user/notes/$(date "+%Y-%m-%d").txt"; }
* 'mg' is micro emacs, my first shell-based editor thanks to OpenBSD. The '+-1' syntax means "open at end of file" so I could easily append.