Awesome

This is a great app for use with syncing data between your credit/devit., This is such an amazingly complex device that isnt just the size of a credit card. It IS a credit card. All of your credit cards. You swipe it just like a simple credit card. However, with Coin, you push a button on the Coin (more like squeezing the circle just below the display) to select which card you want to use and then swipe it or tap the Coin against the card reader if both are nfc compatible.
Great app for a great piece of tech!

Grimpickle! about Coin - A smart payment device for your cards