What's your favorite app for privacy safety?

[carrot0115]

Nowadays, there are more and more private information in our phones. Photos, mails, bank apps, Facebook and messages etc. When handing over the phone to other person, I have to worry that they may see my SMS or other things. It's fortunate to have so many privacy-protect apps to choose. Lock the apps so that they can't be opened without password. Or hide the photos, videos and messages. Do you guy have the some opinion with me? I am using AppLock, what about you?