Hands-down our favorite comparison-shopping app, RedLaser (www.redlaser.com) lets you scan barcodes for items of all sorts to see how much they would cost if you bought them from a competitor. The app pulls up comparative prices from almost anywhere online, including Best Buy, Walmart, Amazon, as well as local stores. In addition to price comparisons, it also shows you nutritional information for different foods and even the nearest library stocking the book you’ve been wanting to read.
The Catch: None: It’s a winner.
Devices: Apple, Android and Windows