Thanks DigiGal, John, and Gutbucket! We appreciate the positive feedback.
I want to mention one thing that may not be obvious unless you have the apps on your device. If you hold your phone (or Pad, or iTouch) running the apps above your mics with the screen pointing straight up to the sky, you can sight down the Recording angle lines and see how the recording angle relates to the performers (or sound sources) in front of the mics. You have to hold the phone still and move your head to sight down each line but it gives a quick approximation. There are better ways to implement this with the device (think camera and gyros) but that will require considerably more effort. We hope to be able to work more on these apps but I wanted to mention the simple method for now.
-MIQ