Amazon likely has one or more of your credit cards already on file, so it only makes sense that one day the retail giant will make an app that lets you use digital versions of those cards wherever youd like. Today isnt that day, but Amazon is launching a wallet app, albeit a very basic one. As spotted by TechCrunch, Amazon Wallet has quietly launched in beta in the Amazon Appstore and the Google Play Store. For now, it allows users to store and use their loyalty cards and gift cards, and to check what the balance is on gift cards from many large retail stores and restaurant chains.