Hi Mike
We're not likely to produce an EigenD for IOS in the near future, for a number of reasons. The first couple are technical, and not something we can do much about, the others are really just about resources and choosing what to do next.
The first reason is that the iPAD does not provide enough power in USB host mode for a Pico. The iPAD (to the best of my knowledge, not sure about the new version but this was certainly true for the first two) only supports low power USB devices (less than 100mA) and the Pico needs the high power specification to operate, it's just not possible to have it run on that little current due to the sensor technology. You could run a Pico but only by using a powered hub, which kind of removes all the advantages of an iPAD over a lightweight laptop (I'm typing this on a Macbook Air, which really isn't that much heavier than an iPAD and in the little version, not much larger either). I can't really see someone bothering to strap a powered hub, power supply (and probably mains cable) etc to themselves just to be able to use their tablet.
The second reason is the available CPU and memory is low on these devices, low enough that one would only be able to run light weight setups. This isn't the end of the world, but the setup compatibility issues and slew of complaints this will generate (and it really does not matter what we say about this, the reality is that people would expect to be able to make setups on their laptop and run them on an iPAD and even figuring out if they would run when moved is very non trivial - its never likely to be a seamless experience) does not fill me with the joy.
All the rest of the reasons are resource issues for us. If we're going to look at another platform for basic EigenD support then it'll probably be Andorid next. Not only would an Android port work on a wide variety of devices rather than just one from one vendor but it would as a collateral advantage give us Linux support. Given the current growth in extremely low cost, surprisingly high performance (check out the Raspberry Pi if you want to know what I'm talking about) Android and Linux devices I think that this market has great promise, particularly in the educational and student market. Not to mention that one can buy an Android tablet at a fraction of the cost of an iPAD, not an insignificant issue for a broke musician.
None of this is to say that at some point an IOS EigenD is not possible, it's just that it doesn't look terribly interesting or worthwhile as yet. The hardware and technical issues may well go away with newer versions of the iPAD, batteries get better, CPU's faster and memory larger all the time. We may make an IOS version at some point when all this looks more viable, just not right now.
John