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Red Laser is an app to scan bar codes. You can scan items while you shop and it will tell you where and what is the lowest price. If it is cheaper somewhere else, you might want to think twice about throwing it in your cart! It works really fast and I haven`t had a problem scanning any item with a regular barcode. You also have the option to type in the item name or speak the item name to search if you don`t have a barcode handy. If you search locally, it can locate books in nearby libraries, which is super cool because then you don`t have to spend money on buying the book. It also has the ability to create a QR code from your contacts, url or text.
I like this app and recommend it because it is free and can help you save money!
Image Source: http://itunes.apple.com/us/app/rl-classic/id312720263?mt=8