QuoteHere's how it works. Simply take any Starbucks gift card you've ever received - or get a new one at any Starbucks store - and then register that card online. That card then becomes your primary source of payment for all your Starbucks transactions. Online, you can use a credit card to refill your Starbucks card. You can even have it set to auto-refill after it dips below a certain amount. Then, download the Starbucks iPhone app. When you go to your neighborhood Starbucks, simply load the app, click "touch to pay," and then scan the phone at a custom scanner at the register. The purchase will be deducted from your Starbucks gift card.