Ive seen those apps too.
Also just set the password protect on the iphone.. if its left nobody can browse it.. if they try to get the password and they do it too much it self destructs the phone so to speak. after 10 tries.. My password sets with in 45 seconds of no phone use. Only emergancy calls can be made in password protect mode.
When life hands you lemons make a stiff drink and have some seafood.