blue business card reader; From online ordering to digital receipt as one of the main payment tools in businesses, the card reader allows customers to pay for their purchase with a bank card and the proceeds from the sale are deposited into the seller's account. For this reason, access to a suitable card reader device plays an important role in facilitating daily operations and managing business revenue flow. Blue Business tries to make it easier for businesses to access this essential tool by making it possible to order a card reader online. Users can register their request through the Blue Business app and get the card reader they need.