Gem Spinner down 60%! This is going straight to Twitter!

Developers often game prices in the App Store, trying to generate interest by temporary sales. AppSniper plays right along, tracking these costs to find the best time to buy an app.

The ingenious utility lists all items with slashed prices (and the percentage of the price cut) within the last three days. The list of sale-priced items can be lengthy, but happily, you can shorten it by omitting your choice of genres. Tap any item to see the full description of the app along with screenshots and historical price data; you'll also find a buy button that whisks you off to the App Store so you can make the purchase.

AppSniper’s coolest feature is that it lets you "snipe" an app that you feel is overpriced. You can set an ideal buying price so AppSniper watches for sales; as soon as the price meets your expectations, AppSniper will let you know. The only drawback is that the app can't manually email you when the price changes; you have to manually launch it on a regular basis.