Use iPhone's Notes app collaborative feature to send private messages that look like regular note-taking to anyone watching your screen.

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.

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

By opening a new note on an iPhone and sharing it with people of your choosing, they'll not only be able to view your note, but also edit and update, all in real time.