Now you can buy stuff from Amazon on your iPhone using Touch ID

The latest update to the Amazon app on iOS includes TouchID support for logging in to your Amazon account. Other apps, like Mint and 1Password, also gained Touch ID support on Wednesday, but Amazon’s commerce-focused app most closely fulfills the promise of biometric payments many imagined when Apple first introduced its secure fingerprint scanner. Just don’t go overboard, or iOS 8 could end up being a very expensive free download.