Apple launched support for Apple Pay almost two months ago, back on Oct. 20 when it released iOS 8.1. It's incredibly easy to use and, as a result, more than a million people signed up to use the service within 72 hours. Apple has continued to release support for new banks and credit card companies. Today, if you're spending money on a credit card, chances are that card is supported by Apple Pay.

The company said recently that it inked new deals with USAA, Barclaycard, SunTrust, Commerce Bank, TD Bank North America, among other institutions. Combined, Apple Pay now works with "about 90 percent of the credit card purchase volume in the United States," The New York Times explained on Tuesday. That means that most of the major credit cards in the United States should now be supported by Apple Pay, and if you have some credit and debit cards in your pocket, it's more than likely at least one of them works with Apple Pay.

The New York Times article also discusses why retailers are appreciating the deployment of Apple's mobile payment service. One vendor said that it helps speed up longer lines of folks waiting to pay for goods and services, for example. In busy places like football stadiums, that means consumers spend less time waiting in line and more time watching the game. It also means that retailers can sell more good at a quicker rate.

Apple will continue to build out its service in the U.S., likely until as many people as possible can use it, but what about the rest of the world? A recent job listing on Apple's site suggests it already has its focus set on Europe, too.