What can PrivacyNotes see about my notes?

Nothing readable. Notes, titles, tags, and attachments are encrypted on your device before they sync. The server stores ciphertext it cannot decrypt, and there is no key on our side to change that.

What we can see is the minimum needed to run the service: how much encrypted storage you use, how many devices you have linked, and sync timestamps. If you sign in with a phrase rather than Google or Apple, we do not even know your email address.