Cooperative purchasing platform by groups of consumers of generic inputs (lime, cement, flour) so that they are able to negotiate wholesale prices to suppliers, generating discounts on their transaction. GoPool is a pool shopping platform (crowdpurchasing) from the buyers side and bidding competition / reverse auctions on the sellers side. It groups automatically the buyers in the market that have the same need in the same city, generating a single wholesale pool purchase from multiple retail purchases. Then the suppliers make their best offer for this volume purchasing, and the entire business is won by the seller who offered the best price during the one-week-auction.