I started using my iPhone's Notes app for private conversations. Here's how.

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.

Discover how to use Apple Notes to organize your life, boost productivity, and never lose an idea again with this step-by-step guide.

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.

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

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