PriceRadar

How it works? As Amazon's products are often subjected to price variations, either up or down, you can select for every product a target price and get a push notification when the price drops; so you can instantly purchase the item and save money.
The app also provides the product's trend which you're monitoring and tells you whether the price has gone up or down since you have added the item, in such a way you always know if you have done a good deal.
If enough data are available, PriceRadar will draw a graph of the price trend! Amazing uh?
The app works on all items available on Amazon's worldwide stores and furthermore it's not necessary to have an Amazon account to track products.
PriceRadar supports a maximum of 10 items, but you can upgrade the number of items by in-App purchases.
PriceRadar is completely translated in English, Italian, Spanish, French and German.
Start saving now monitoring your Amazon's favorite products!
With future upgrades you will get amazing new features ;)