Passbook and Apple pay
Passbook already stores your boarding passes, tickets, coupons, and more. Now it can store your credit and debit cards, too. To get started, you can add the credit or debit card from your iTunes account to Passbook by simply entering the card security code.
To add a new card on iPhone, use your iSight camera to instantly capture your card information. Or simply type it in manually. The first card you add automatically becomes your default payment card, but you can go to Passbook any time to pay with a different card or select a new default in Settings.