iOS 18 will offer a new security feature that allows users to lock individual apps, according to multiple sources familiar with the matter. This feature will give users the option to lock built-in iPhone apps like Mail, Messages, Notes, Phone, Photos, Safari, Settings, and more, providing an extra layer of privacy and security. Unlocking an app would require Face ID authentication, and it is likely that the feature will also work with Touch ID or an iPhone's passcode. We have not confirmed if th...