https://www.cnet.com/news/if-you-get-apple-card-you-may-never-be-able-to-leave-the-iphone/

The world of payments isn't new to Apple, which launched Apple Pay, its mobile payment system, in 2014. But a full-fledged credit card, backed by Mastercard's payment network and Goldman Sachs, represents Apple's cannonball dive into banking in a way that will have ripple effects for Visa, Google Pay, Samsung Pay and every other digital payment player.

Everything from management to verifying transactions takes place on the iPhone.