[ Can't be this easy? Super simple card payment window creation application, deal app ] The Deal app is a payment service that allows anyone to easily create a card payment window with the app and receive card payments. With its own safe trading system, it provides a convenient and safe trading platform for both sellers and buyers. I saw who used the deal app...(shocked) · Individual sellers also: Used transactions (safe transactions), SNS market, tutoring classes, freelancers, flea markets, fo