Mobile App
After a two-year pilot period, Starbucks launched a nationwide mobile payment app in early 2011. The app is available for iPhone, Android and Blackberry, and, according to a June 2011 article on "Mashable," it can be used at 9,000 Starbucks locations. To use the free app, you simply add your Starbucks card number. From there, you can use the app to make purchases, track your rewards and check your balance. You can also find which Starbucks stores will accept mobile payments.