According to the developer of iKeyGuard, This tweak will allow you to know what your employee is doing at work. It will record every single key press. Also it has the ability to email the logs at customizable intervals. The tweak itself is completely invisible. Also you can use this tweak to spy on kids and spouses.
iKeyGuard tweak is available in Cydia under BigBoss repository. It costs $9.99 USD. You should note that you will need to have jailbroken iPhone, iPod touch, iPad to install this tweak. If you don’t have jailbroken iPhone, iPod touch, iPad then you can follow the steps posted here to jailbreak your iPhone, iPod touch, iPad on iOS 4.2.1 with Redsn0w. [Via]