Using

Starting
Type karm at a command prompt or select Personal Time Tracker from the Utilities group in the KDE start menu. The standard and command options are available, and can be listed by entering karm --help at the command line.

General usage
Enter the various tasks you wish to track.
To start timing a task, select it and double-click on it, choose Start from the Clock menu or press the Start button in the toolbar. To stop timing it, double-click it, choose Stop from the Clock menu or press the Stop button in the toolbar.
Multiple tasks can now be timed simultaneously.
Tasks can be saved and are restored at the next use.