Read this blog post through to the conclusion if you want to learn How to Contact Sutton Bank for the Cash App Ultimate Guide. Cash App is a well-known peer-to-peer money transfer service that supports both Android and iOS operating systems and has made a name for itself in the field of online payments. One of Square's authorised online mobile payment services, Cash App, enables users to transfer money between accounts without having to go to the bank. Many users have access to Cash App's mobile payment service.