If you don't have an iPhone or iPod Touch yet, we just found your new reason to get one: Coupon Sherpa ($2), the most shopper-friendly app out there. When browsing a brick-and-mortar store (you still do that occasionally, no?), you can use Sherpa to find any coupon that location is offering—there are more than 100 Sherpa-friendly stores, and the number is growing. Then, simply hand your i-gadget to the attendant checking you out, and ask that he scan the bar code or plug in the numbers. Your wallet gets a serious discount, the earth gets a paper break and you get to strut out of the shop reeking of coolness.
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