Attention, shoppers: If you just decided to join the Black Friday shopping crunch but didn’t prepare well, don’t despair: Just pick up your smartphone. It can help you find out what other consumers think of a product before you buy it – or figure out where to buy that hot toy on the biggest shopping day of the year. “Information is power,” says Jeff Goldstein, president of PriceGrabber, a web service (with app) that collects pricing from about 4,000 retailers. Retailmenot, CouponCabin and CouponSherpa all deliver discount coupons, and many of which can now be simply flashed at the cash register, where the bar code can be scanned from your phone.
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