Active camera and/or Track IR pro?

I'm confuse here guys. Just saw a program called Active camera 2004. Now reading the profile it seems to do exactly what TrackIR pro but with the use of the mouse as I understand.
My question is, is it possible to use both or is it better just getting the TrackIR pro?
Charles King
'What we perceive to be may not be what we believe to be.'
My question is, is it possible to use both or is it better just getting the TrackIR pro?
Charles King
'What we perceive to be may not be what we believe to be.'