The main point of my setup is to have something as portable as possible. Sure I can have a much more advanced rig with more powerful software on PC, but that wouldn't be feasible to bring around to measure gear willy-nilly.
The portability of the IMM-06 and its compatibility with mobile apps does basically the same thing, allowing me to measure up a lot of gear at various audio shops at my convenience. I'm not saying that what I measure will be 100% accurate (hell, nothing is 100% accurate even with all the couplers and standards available on the market) but at least it serves as a valid reference simply by virtue of a large volume of data.
Oh I didn't know you were doing it as portable. Very interesting stuff. So how do you emulate ear? What coupler do you use?