Google unveiled its new mobile payment service Android Pay Thursday morning at its annual I/O developers' conference in San Francisco. While Google may have had Google Wallet in 2011, years before Apple Pay, it was never able to take off. Like Apple Pay and Google Wallet— Android Pay works by linking a major credit card to the service and waving the phone near a merchant's check out near-field communication machine to confirm the purchase. Retailers who accept Android Pay (a group that includes Macy's, Subway, Walgreens and other big brands Thursday's launch) can also let customers use the service to buy goods within their apps, rather that require them to enter a credit card number or use a third-party service like PayPal.
