We've covered the $1.99 RedLaser app a couple times already in this blog. It's a barcode reader that lets you scan the barcode of a product you want to buy and then searches for stores that have a lower price. ShopSavvy is another such app, and it's free. It currently only works with iPhone 3.1 or higher. It was first available for the Android platform, and got a lot of attention. The iPhone version was released last month. Many of the reviews say it doesn't work as well as RedLaser, but some say that it works well if you follow the tips. Version 1.2, expected in the coming weeks, should improve the scanning ability. You can read more about how people use ShopSavvy in this article in the New York Times. It tells about a shopper who found a product for $29.99 at Wal-Mart, used ShopSavvy to find that it was $19.99 at a Target store right across the street, and then used a different app to find a $10 coupon, bringing the price down to $9.99 — all in just a few minutes. Other features include maps to store locations and product reviews. There's also a great article about using ShopSavvy and other apps in the Wall Street Journal.