Out shopping, you often see products you'd like to buy but decide to go home and research prices before getting out the credit card. Well, Red Laser does this for you in seconds, even before you've replaced the box on the shelf. All you do is open the app and point the iPhone camera at the barcode. you don't even need to press the shutter because Red Laser senses when it has done a successful scan.
Immediately, Red Laser searches Amazon and Google and produces a list of competitive prices. Here in the UK it sticks to British suppliers, as you'd wish. I tried it today at the Apple Store. A Kensington mini-USB hub was £9.95. Red Laser found it on the web for £8.81. So, taking into account the shipping costs, it made sense to buy from Apple.
This is altogether brilliant and certainly makes shopping more fun and more productive. Apart from the chance to compare prices, it is a quick way of noting possible purchases and then researching comparative data on the internet later. Red Laser currently costs £1.19: a guinea well spent.