Is Cash App Phone Number Available On Sunday Or Not? Cash App Phone Number works flawlessly to let you have a word with the team of Cash App. However, it works from Monday through Friday to connect you directly with the Cash App professionals. Besides, if you are looking to use the same helpline number on Sunday, you won’t get access as it will not work on weekend. In such a case, you can try making use of the official help section where you can get the required aid right now. https://www.contactmail-support.com/customer-service/cash-app