So as to transfer funds apple pay to cash app. For this first is to add cash card to apple pay.. This can be done with below steps. Step one is click on cash card tab located on cash app. Step two is tap on add to apple pay. Step three is follow the prompts shown on screen. Second is to add cash card to apple pay wallet. Step one is open apple pay wallet and then click on a plus sign then follow the instruction given and then verify yourself.