U.S. coffee chain Dunkin' Donuts has added Passbook support to its iPhone app, allowing users to pay for their coffee and donuts with a virtual gift card stored on their phone. Starbucks added similar support to its iPhone app back in October. PAY RIGHT FROM THE APP WITH A VIRTUAL DD™ CARD. Use the app to pay for all your purchases. You can either add a plastic card or purchase a virtual card via the app. Simply tap the DD Card you wish to use and present the barcode to the DD crew member to be scanned, and you’re good to go. You can also manage and reload your DD Card right from the app. APPLE PASSBOOK INTEGRATION Now you can purch