Starbucks has launched a smartphone payment service at its 6,800 managed stores in the US. Customers with Blackberry, iphone or ipod touch devices can now pay for their coffee, after downloading the relevant app, by using an in-store scanner to read a barcode generated on the device’s screen. Starbucks estimates around a third of its customers use smartphones, and Blackberry and iphone are the most popular formats. In addition to the mobile payment capability, the apps allow customers to manage their Starbucks card account, check their card balance, reload their card with any major credit card (iPhone users can also use the PayPal feature), check their rewards status and use the store locator feature. Brady Brewer, vice president Starbucks card and brand loyalty, said: “Today, one in five Starbucks transactions is made using a Starbucks card and mobile payment will extend the way our customers experience and use their Starbucks card.” Smartphone payment can also be used at a further 1,000 locations in the US serving Starbucks.