How do I activate my Cash App card? To activate your Cash App card, go to the app store on your phone and download the Cash App app. Once downloaded, tap on the menu icon in the top right corner of the screen and select ‘Cash App Card’. You will now see a list of cards available to you. Tap on the card you want to use and follow the instructions on the screen. Get more information about activate cash app card visit here: activate cash app card