Hjaelpe (Danish for Help, pronounced similar to Yelp, is an HTML5 / JavaScript iOS App demonstrating the Yelp API by recreating a portion of the service's basic functionality (Limited only by what is currently available from the Yelp API without resorting to page-scraping).
http://jamesfuthey.com/hjaelpe
Packaged as an HTML5 iOS app (Open in Safari, Click the share icon in the upper-left hand corner, and select Add to Home Screen
to install to your device).