Do not know where and how to buy? don’t know if there may be any offer in special brands? are looking for any brand in particular? You don’t know how to buy over the Internet? Therefore we present Carritus, a site offering the tool to compare the prices of different supermarkets in Spain: Mercadona, Carrefour, Condis, El Corte Ingles, Caprabo and Eroski. He is a unique system in Europe, at the moment not exite no pages with the tool that offers Carritus. The tool will allow users that usually fill the truck over the internet (that every day there is more) can compare the prices of different supermarkets of Spain, thus saving time and price. The project plans to put more supermarkets than there are currently available, to be able to offer the service in all major supermarkets in the country. Each day grows more business on the Internet, especially in Spain, where more than 4 million others who observed there are purchases by internet. That is why it is so useful a tool that allows so, compare prices and save at the same time, without leaving home and without having to queue. It could soon extend the list of supermarkets, although for the moment they will only be available: Mercadona, Carrefour, Condis, El Corte Ingles, Caprabo and Eroski, as indicated above.