application to searching and monitoring of discounts

The application will have two ways. First will be to public consumer, they going to can register an item what they want to buy and de application show all itens what are available on the market, the consumer also can register in the system an item and going to receive in e-mail an alert every time the product has its price modified in the previous selected stores. The second way is the market monitoring, we going to save the informations for rehearse to companies with virtual stores, so they going to know prices their competitors and industry going to can observe the prices that the market is practicing