Google Wallet vs. Amazon Wallet
In Amazon Wallet you can add a gift or loyalty card by scanning the barcode or typing in the account number. Taking a picture of both sides of the card also serves as a visual reference and gives you a digital copy so you can leave the plastic behind.
While both Amazon Wallet and Google Wallet act as data storage for various gift and loyalty cards, Google Wallet’s solution is currently more powerful. When you add a supported rewards service, Google’s servers talk to the account in the cloud and can provide real-time account information.