Lock your notes on iPhone
In the Notes app , you can lock notes to protect your sensitive information with a password, Face ID (iPhone X and later), or Touch ID (other models). Notes uses a single password for all your locked notes, on all your devices.
Set up your notes password
The password you set applies to all notes you lock from now on. Notes that already have a password aren’t affected.
Go to Settings > Notes > Password.
Enter a password and add a hint to help you remember it.
For added security, you can also turn on Face ID (supported models) or Touch ID (other models). If you turn on Face ID or Touch ID, you can still access your locked notes if you forget your password later.
Important: If you forget your notes password, and you can’t use Face ID or Touch ID to unlock your notes, you won’t be able to view your locked notes, and Apple can’t help you regain access to those locked notes.
You can reset your notes password, but this doesn’t give you access to previously locked notes. The new password applies to all notes you lock from now on. Go to Settings > Notes > Password > Reset Password.
See the Apple Support article Lock notes on your iPhone, iPad, iPod touch, and Mac.
Lock a note
You can only lock notes on your device and notes in iCloud. You can’t lock notes that have PDFs, audio, video, Keynote, Pages, Numbers documents attached, or notes that sync with other accounts. You can’t lock an iCloud note that has collaborators.
To lock a note, do one of the following:
In the notes list, swipe left on the note, then tap the lock.
Open the note, tap , then tap Lock Note.
When a note is locked, the title remains visible in the notes list.
To remove a lock from a note, tap , then tap Remove Lock.
Open a locked note
Unlocking one note unlocks all your notes for several minutes so you can easily jump into another note or copy and paste information from other apps.
Tap the locked note, then tap View Note.
Unlock it with Face ID (iPhone X and later), Touch ID (other models), or your Notes password.
To lock your notes again, do one of the following:
Tap the lock icon at the top of the screen.
Tap Lock Now at the bottom of the notes list.
Close the Notes app.
Lock your iPhone.