Simple Amazon Web Services Application

Hi, I am looking for a simple piece of software that allows me to pick products from [login to view URL], [login to view URL] and other Amazons using their Web Services (AWS) and the Automatic Price Change Notification service (APCN). The software will first show me all of the Categories e.g. Electronics and the sub-categories. I will provide a series of filters: Max / Min Price Keyword Price Change Amount (% amount and monetary amount eg US, GBP) - The Price Change can be a Positive or Negative amount (and a few other variables to be decided later) The software will then show all the matching products and I will perform a multi-selection of the products I wish to monitor. The app will then notify me of when the selected products have exceeded the specified price change filter. That's it for now. IMPT: Multiple selection is really important. I don't want to do any selection singularly. Must be able to highlight multiple rows and initiate the monitoring of all the desired products with a single click. Thanks Mark