Most of the best handheld money apps are still iPhone-only.
Why it's great: This app scans any bar code and uses Google Product Search and TheFind.com to locate the best price. At Best Buy, Money saw two Blu-ray movies for $29.99 each; RedLaser found them for $19.99 at Walmart.com. Best Buy matched the price on the spot. Result: a $20 savings.
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