We have built the service so that by adding your card you save time not having to enter the information every time you want to make a purchase. In addition, you can also add more cards that you can switch between, if you wish. We treat all card information with the highest level of security and industry standards. Additionally, you can open the Karma app at any time and remove a card you previously added. If you have any further questions about this, please feel free to contact us.