I use this iPhone feature every single time someone wants to borrow my device

Guided Access is an iPhone privacy feature that locks the device into a single app when you lend it to someone.

It prevents others from browsing your messages, photos, apps, and notifications while using your phone.

The writer says they use it every time someone borrows their iPhone to avoid accidental privacy exposure.

You can enable Guided Access in Settings under Accessibility, and it can be secured with Face ID.