Encrypted Notes on iPhone: What Is Actually Encrypted in 2026

Quick answer: Notes on an iPhone are encrypted on the device by iOS Data Protection as soon as you set a passcode. In iCloud, Apple Notes are end-to-end encrypted only with Advanced Data Protection, while locked notes always get extra encryption from your passcode or notes password. Apps differ: some add their own end-to-end encryption, others, like Secure Notes on iPhone, rely on iOS plus strong locks.

Are notes on iPhone encrypted?

Yes, on the device. When you set an iPhone passcode, iOS Data Protection encrypts the files apps store, including notes, with keys tied to your passcode and the hardware. Whether notes are also end-to-end encrypted in iCloud depends on the app and on Advanced Data Protection.

Data Protection is why a powered-off or locked iPhone is hard to read even with the storage chip in hand. It uses AES-256 in hardware, and the keys never leave the device's Secure Enclave. Learn the cipher basics in what is AES-256 encryption.

Are Apple Notes encrypted in iCloud?

Locked notes in Apple Notes are encrypted with your device passcode or notes password. Regular notes in iCloud are encrypted, but with standard data protection Apple holds the keys. Turn on Advanced Data Protection and iCloud Notes become end-to-end encrypted, so only your trusted devices can read them.

• Regular notes, standard iCloud: encrypted in transit and on Apple's servers; Apple holds the keys.
• Locked notes: encrypted with a key derived from your passcode or notes password.
• Advanced Data Protection on: iCloud Notes are end-to-end encrypted with keys only on your devices.

The full breakdown is in is Apple Notes end-to-end encrypted and Advanced Data Protection, explained.

Does Secure Notes encrypt notes on iPhone?

Not with its own encryption layer. Secure Notes on iPhone stores notes on the device under iOS Data Protection and locks them with its passcode, Face ID and per-item PINs. From version 3.8.1, its Pro backup files are AES-256-GCM encrypted with your password. On Android, Secure Notes encrypts the whole vault with AES-256.

What Secure Notes adds on iPhone, honestly stated:

• An app-wide lock with passcode, Face ID or Touch ID, plus a PIN on any note or folder.
• A decoy PIN (Pro) that opens a separate, harmless notebook.
• App switcher hiding (Pro), so notes do not appear in recent apps.
• Optional sync (Pro) through your own private iCloud database. We have no server that stores your notes. iCloud copies get Apple's iCloud protection, end-to-end with Advanced Data Protection.
• Encrypted backups (Pro, version 3.8.1 and later): an exported backup file is encrypted with AES-256-GCM using a key derived on your device from your backup password. Without the password, the file cannot be opened.

On Android the picture is different: the Secure Notes vault is an AES-256 encrypted database (SQLCipher), its key is protected by your PIN through Argon2id, and photos and voice notes are encrypted too. See the security page for both platforms.

Which notes app should I use if I need end-to-end encryption?

If you need notes that are unreadable even to the sync provider, pick an end-to-end encrypted app such as Standard Notes or Notesnook, or turn on Advanced Data Protection for Apple Notes. If your main threat is the people around you (a partner, a coworker, a forced unlock), app locks, item PINs and a decoy PIN do more day to day. Our encrypted note apps comparison covers the options.

What does encryption not protect against?

Encryption protects stored data, not what is on screen. A weak passcode can be guessed, screenshots of unlocked notes are plain images, and anyone who has your unlocked phone sees what you see. That is why app locks, item locks and hiding the app switcher preview matter alongside encryption.

Ready to put this into practice? Start with the password setup guide or set up a secure folder for the notes that matter most.