No. We neither store or see your credit card information. We integrate directly with Visa, MasterCard, etc (who already have your card information of course). When you register your card with the app, your card number is encrypted with bank-level security and sent directly from your phone to Visa, MasterCard, etc. They mark your card as enrolled and send us a notification when you use it to make a purchase at a participating location.
We never know or even see your credit card. We will not and cannot charge your card, nor can your card be stolen from us - we do not have it.
All data sent to and from your phone is encrypted.