There are many Tweaks in Cydia which allows you to lock third party Apps and the official. Apps of iDevices. The problem was that you could only lock the whole Apps or none. Today we came across a Tweak called AppLocker.
This particular Tweak, AppLocker allows you lock any particular App with a pass code of your choice. This tweak will set the password on a particular app defined by you and to any particular music or video file. This tweak is much better than adding the parental restrictions which is available in settings.