Locktopus: set a password for your applications

Locktopus is an application, compatible with all devices and with any firmware from 3.x to 4.x, through which you can set a password for the applications installed in your terminals. Locktopus works in a similar way to other applications that perform this function, but unlike this one, it has a much simpler implementation: open the application, set a main password, then close the application and go to SpringBoard; select an application until they start to "shake" and you will see a "lock" in the bottom left of each application, press it, the selected application will be locked and will require a password to be opened.

Use lock toggles in wiggle mode
The default password is: Password
Change the password from Settings app
Forgot your password? Reinstall this extension with Cydia. If you locked Cydia, you must disable this extension with SBSettings, or by manually renaming or removing it via SSH. Upon doing so, you can open Cydia and reinstall. Contact the authors if you need further assistance.

The application is very useful, but at the same time easy to use, and if you forget the set password, you just have to reinstall the application to reset it. Locktopus is available in Cydia for only $2.