PanicLock allows you to quickly and discretely lock access to your iPhone’s app icons using simple Activator gestures. After installing the tweak, simply head to the tweak’s preferences, and you’ll be able to configure the Activator gesture of your choice.
I recommend using an Activator gesture that requires the use of the iPhone’s physical hardware buttons. That way, you can use PanicLock as discretely as possible.
After you enable PanicLock, you’ll still be able to peruse your iPhone’s Home screen, but when you tap on an app the app won’t load. You’ll need to disable PanicLock by means of the same Activator gesture to regain access to your apps.