I started a project page for this (linked in the thread intro). I got some code from one developer, and I've been looking through it. I don't know anything about iPhone, but I'm familiar with Xcode, so at least I can read it. Still, it looks like it would be a lot easier to just get a proficient Xcode developer to write the app, rather than learning the iPhone just to do one app. So I'll work on the specs, and keep contacting developers until I've either exhausted the list or found one willing to take it on.

 

Then, of course, comes the scientific analysis of the data, i.e., the correlation of the EM data with the physical processes responsible for them.