Fingerprint authentication adds secondary authentication before a transaction can be initiated. Additionally, it makes sure that nothing get's bought by accident and doesn't require remembering anything such as a password or a pin to use.
Apple avoids any contact with real credit card information, except during setup at which point all information is handled carefully using encryption throughout the process.
Apple Pay is compatible only with iPhones and only those that include an NFC and Secure Element chips which currently is only iPhone 6 and iPhone 6 Plus.
Google has a partnership with Bancorp Bank that issues a Virtual Card to Google Wallet users that works as an intermediary between customer's card and merchant. It gives more choice in terms of compatible cards and works as a card fraud mitigation technique.
4-digit PIN that has to be entered before any transaction can take place adds secondary authentication and makes sure that nothing gets bought by accident.
Android Pay functions as a platform that allows third-party developers to create payment apps on top of it not as a standalone app itself. This potentially will enable higher competition between available frontends and as a result better solutions without having the payment information tied to one tool.
Samsung Pay supports Magnetic Secure Transmission technology that allows using the phone to swipe near a credit card swipe reader to pay. The technology currently is only supported in Galaxy S6 and Galaxy S6 Edge phones.
Magnetic Secure Transmission technology that allows using the phone to swipe near a credit card swipe reader to pay is only supported in Galaxy S6 and Galaxy S6 Edge phones.
4-digit PIN that has to be entered before any transaction can take place adds secondary authentication and makes sure that nothing gets bought by accident.