Key loggers monitor current activity at PC and record it in stealth mode. If you want to monitor your computer while you are away, or if you were a parent wanting to keep an eye on your kid’s online activities, you can use a key logger to record their activities. While there are many key loggers available for computer. Now key logger for iPhone is also available. If you want to archives text messages and emails sent from any iPhone, iKeyGuard makes key logging easy on your iPhone or other iDevice.