What are some good shopping/Deal apps?

[johnmcd348]

Just saw a news report for an App called ShopKick that's available for iOS and Droid that sounded pretty neat. It uses GPS to keep tabs on your location and when in a particular store,it would send you discount offers and deals good within that store . I know about other apps that you can scan and it will search for the best price but are there any apps out there similar to ShopKick? I've searched but only found the other scanner type apps. It sounds like something that would be good to have over the holiday period.