Create private chat rooms using the iPhone Notes app collaboration feature with instant messaging capabilities and full control over conversation privacy.

When locked, your iPhone locks Notes like any other app, requiring whatever security check you use to unlock your device.

Learn how to export iPhone Notes to Markdown in iOS 26. Save time, preserve formatting, and streamline your workflow with ...

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Send secret messages on your iPhone using the built-in Notes app. Share and collaborate on notes for private, real-time chats—no extra apps or tools required.

Though you can lock and hide apps on iOS 18, which includes the Notes app, you might want to add more security to individual entries by locking notes.

The Notes app may be the iPhone's most useful and commonly used app, and the ability to use it collaboratively only enhances that usefulness.