Very interested in this. Tho I feel a bit sad as I had an idea for this precise product years ago and built some crappy cardboard prototypes but never quite got it far enough along to make anything of it. Understanding optics was something I got stuck on. The "damn, that could've been me if I'd worked harder" feeling stings.

Congratulations to the team. If and when they release an Android version I'll buy one straight away.

Juding by the comments they should perhaps market this more for home use and less for out in public. Still, I think this has the potential to be definitely very fun and possibly very useful.