When you temporarily lend your own mobile phone to family members, friends, classmates, workmates, or even children to use, I guess some of us would be worried about that our privacy might be snooped around. In cases like these, we may only take the following two measures: 1) not to borrow by making excuses; 2) watch him/her to use your phone, and then get it back as soon as possible. Apparently doing so is always not satisfactory enough, this time you can give ES App Locker a try.