Believe it or not, we actually use this for our children! We homeschool them, and Time Doctor lets us track their activity, the websites they are visiting, the apps they are using, and more.
They have certain tasks they are responsible to do each day, and with Time Doctor, we don't have to hassle them. They enter the task they are working on (must spend at least 60 minutes a day on Khan Academy, etc.), and they track their time.
The Time Doctor staff is so flexible with the managers we have set up, that we can even let the children's uncles and grandparents see their daily activity (as if they are clients).
It is actually one of the more expensive Time Trackers out there. But we couldn't find anything else that would let us have the same hands-off flexibility in oversight with no additional expense.