Actimeter is an application that tracks your computer activity and shows it on a traditional, easy-to-read meter.
Actimeter does this by counting the frequency of all your computer interactions or events: mouse clicks, keystrokes, scrolls and mouse moves. It then calculates a score value on a scale from 0 to 100, using a carefully designed mathematical formula.
The score is calculated based on a time period that you can adjust yourself: the time period can be as short as one minute or as long as 90 minutes. Shorter periods make Actimeter react faster, longer periods give a more realistic view of your activity.
You can also adjust the frequency of Actimeter's tracking from only once a second to as fast as 10 times a second. The faster the tracking is, the smoother Actimeter reacts and moves. Please note that faster tracking requires more power and more computer resources. You should try different tracking speeds to find a suitable balance between Actimeter's performance and your Mac's capability.