[fire]

Honestly I just want a sync solution I can host on my NAS that the mobile app can still access, which unfortunately isn't something the app natively supports, and more or less all of the current community solutions come with one caveat or another ( like the otherwise lovely git solution having issues on iOS clients, for example )

[lucw]

You can't host the sync server on your NAS, but you can definitely synchronize your notes to your NAS, which means you still have them available in case your desktop goes down and your smartphone breaks or is lost or something.

[nsteel]

Does Remotely Save not work on iOS? If it does, you can host a WebDAV server on your NAS.