Similar to how people can log into computers via a “guest” account. iPrivacy provides the ability to let people log into your phone via a guest account as well. This way they can’t look at your email or text messages or mess up any settings you have on your phone.
Here is how this "Guest Mode" works: One lock-screen, Two PINs. One for me, one for anyone else who might use my phone but doesn’t necessarily need to see everything. Punch in your Host PIN, your phone unlocks as normal. Punch in the Guest PIN, it hides anything that you want. You can also turn ON/OFF Guest Mode with SBSettings and Activator toggle.
The iPrivacy package is free; however, you will need to install various plugins to block each area of the OS. For example, there is a Photos ($1.99) plugin, a Messages ($1.99) plugin, and an Applications ($2.99) plugin. An iPrivacy Plugins Pack has plugins for Notifications, iPod, Folders, and Voice Memos.
Installing each of these plugins will let you configure the access a user in guest mode receives to its relevant areas of the OS.
Check out iPrivacy in the photos and video below or head to the Big Boss Cydia Repository to download it.