Thanks Volt, looks like another applied Stereo Zoom app. I just downloaded it and its a bit clunky at this point for me, but we'll see how it evolves.
Reminder to folks that this only deals with the directional imaging aspects of the direct sound elements in a recording- just one aspect of many in the pantheon of things which affect what we hear via stereo recording an reproduction, and not the most important among them. However that's not to dismiss the importance of gaining better control over it. Good tools to help manage imaging can be useful. If confused by this thing rather than simply frustrated trying to get it to do what you want, a re-read of the iStereo Zoom paper will do much to explain what's going on behind this thing.
I think the innovative things is has going for it versus the other apps out there are:
1. The implementation of the height element
2. Being able to view data for multiple sound sources, and move those around and see what it does to the imaging
That said, it's not the easiest to use right now, especially on a smallish phone screen. On the other hand,
If you check in on the GS thread, you'll see the developer is interested in user feedback.