iPhone productivity app that tracks hours worked with an efficiency parameter
When I get grilled to account for every move I make I just look at my emails and history and the time frame from there. I don't know if the computer can determine what is the difference though. There might be setting as if you were a parent ant wanting to know what exactly you kids are doing that can help with that. You could make 2 accounts on the computer and use one for work and one for other.