What is Cash app customer service? Across the United States, the Cash app built by Square plays a significant role as it facilitates users to send and receive money from one account to another with ease and comfort. Despite the Cash app's safety features, many users face difficulties in operating the app and conducting online transitions. Cash app customer service is the way to resolve all these issues easily. Users can dial the toll-free number of the Cash app 1-800-969-1940. https://www.contactcustomer-service.co/phone-number/Cash-app