I got this app a month ago and could very rarely make it work on my IPod Touch 4th gen. Part of my problem, as I understand it now, is that I am not used to using the camera. I was playing with it again recently and I found the "sweet spot" for distance and angle, etc. I'm still finding it to be quite a challenge. I love the idea, and I hope you guys keep up the good work. I'm hoping that I just need to be more comfortable with the camera, and I am going to keep practicing a bit at a time.
Thanks,
Teresa