This app is definitely a "must have" for any android phone owner. during the time i had my MOTOROLA DROID, this app believe it or not saved me tons of money, i know an app that is actually useful. anyway, the app works by using the camera to scan the bar code on the item you would like to purchase. after reading the bar code it looks up online deference between prices for the same item you just scanned. there for being able to find the cheapest price possible. for example i was at a local store down the road from where i live and there was a set of speakers that i was looking to purchase, i scanned the bar code and found out that i could get the same speakers for 10 bucks less just a few miles down the road.