The last major US credit card not already signed up by Apple for its payment service has now come on board.
Following in the footsteps of rivals Visa, MasterCard and American Express, Discover will allow its card members in the US to make NFC-based payments in stores via Apple Pay.
Discover customers will be able to make payments via the iPhone 6, 6 Plus and Apple Watch at the point-of-sale. In addition, customers with iPad Air 2 and iPad mini 3 will be able to make purchases within apps.
Discover will go live with Apple Pay some time this autumn.
Like American Express, Discover issues its own cards as well as operating a payments network like Visa and MasterCard.
Discover has been slower than its rivals in joining Apple Pay, which is curious given it was early to strike mobile payment deals with previous initiatives from PayPal, Google Wallet and Isis (later Softcard and now absorbed by Google Wallet).