NoteVault: a real notepad app hiding an encrypted vault behind a secret word NoteVault is a genuine Material 3 notepad app that hides a private AES-256-GCM encrypted vault behind a secret word in the search bar. Keep photos, videos, PDFs, and files 100% offline with zero cloud, zero sign-up, and zero trace. Unlock with fingerprint, PIN, pattern, or password, and protect what matters with a discreet notes app that looks normal but works like a secure vault.