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What you might not know is that the hearts are part of a mobile augmented reality program. The chain has updated its Cup Magic iPhone and Android app from the holidays with a Valentine’s Day twist: If you have the app and put the cups within your phone’s field of vision, your phone will display images of heart-shaped flower petals flying off the cup. You can also send a video of the scene to your beloved via email or Facebook. The embrace of mobile technology seems to have helped Starbucks’s bottom line. Sales rose 16% in the company’s most-recent quarter and profits were up 10% — both were the biggest rise since the recession began. Guiness produced a similar app that allows users to play with AR and their beer.