Aperture Inspector analyzes your «Aperture 3» library and finds out all the little facts about your pictures. What lens was used, when was it used, at what ISO, Aperture and Zoom ? Do you actually use your expensive zoom, or is it really just for display? And your wide-angle, do you shoot it wide all the time, or do you use the full range? Perhaps you actually take most pictures with your kit-lens? No need to wonder - your inner photo-nerd has just found the thing.
Try it for free now, and buy it if you like it.