I'm not an iPhone user myself, but I just saw his on a pal's iPhone and it is amazing, and FREE!
http://itunes.apple.com/us/app/zombie-survival-guide-scanner/id382278774?mt=8 (http://itunes.apple.com/us/app/zombie-survival-guide-scanner/id382278774?mt=8)
Nice! I'm going to get this for sure. I already have the Zombietron app. I have stuff on there for my grandson, he'll love it especially since I only use my phone as a phone! I never play with the apps. or ipod function. :)