5. RedLaser This app provides users with ample number of benefits. You can browse for the nearest retail store by using you phone's location through search called TheFind.com. It allows you to scan and compare prices of different products online/at the stores. And not just the food prices, RedLAser also provides you with nutritional facts and related information. It also helps you find books from various retailers. All you have to do is scan the book; RedLaser will search for copies of the book through WorldCat, world's largest library catalog.