Google Shopper is an app that has helped tremendously with my impulse purchasing and has even saved me money few times. The goal is to allow you to ‘shop around’ by showing all of the local and online store prices concerning potential product purchases.
Let’s say I wanted to buy a Sony HDTV. I would type in the model number or type of TV and it would bring up the best deal in a local store or on an online store. This way I can make sure I am getting the best deal possible regarding the TV.
Aside from simply allowing you to search for the products by name or model, the Shopper app allows you to search for an item by picture, much like Google Goggles. The image recognition seems to work well, at least with my Motorola Droid. I would assume a lot depends on the image quality of the camera on the phone.
Google Shopper is available on the Android Market.