HoursBoard

HoursBoard is a tool to generate details about how much time your screen was locked.

It gives the following details:

Screen lock time.
Screen unlock time.
Total time computer was switched ON.
Keep track of each logout by adding a Logout Tag.

Installation:

Edit the conf file to specify directory to save logs.
Put hoursboard-monit in your startup script.
Run hoursboard.py to give you screen lock details.