I keep encountering this problem at friends' and it's always the same thing. They wonder why Notes does not sync up to iCloud.
I grab their iPad or iPhone and realize that their notes are written to "On My iPad" or "On My iPhone".
I then google around for a decent app, never find one (is there really no such thing?)..
And wind up copy-pasting them from "On My iPad" to "iCloud" one at a time. Thankfully this time he only had 27 notes so it didn't take that long.
Sometimes I panic and start emailing the Notes one at a time to his email address and then paste them onto his iCloud via OS X action.
Is there really no better way? I've checked around for advice and it seems to always be "Just email them" "Just copypaste them".