NEW YORK ( TheStreet) -- Apple's ( AAPL) iOS is the top smartphone operating system in the U.S., with 28.6% marketshare, according to a new report from Nielsen. Google's ( GOOG) Android OS, meanwhile, comes in at second with a 25.8% share. The report also noted that over the past six months, 40% of people who purchased smartphones bought ones running Android. Shares of Apple rose 0.84% in pre-market trading Tuesday to $332.35. Google was up 0.27% to $606.00. In other Google news, the company is reportedly exploring a payments system that let users purchase everyday goods by waving their smartphones against a register, according to Businessweek. Mobile payment transactions are expected to top $1 billion by 2014, according to IE Market Research. Oracle ( ORCL) may have discontinued its Java App Store, according to a blog post on app analytics store Distimo. The application marketplace, opened by Sun Microsystems in 2009, was targeted at the more than a billion Java users throughout the world. Nintendo's DS game systems have sold more than 47 million units in the U.S. since they debuted in November 2004, making it the nation's best-selling video game system of all time, the company announced Tuesday. The Nintendo Wii sold more than 7 million units in 2010. Location-based gaming start-up SCVNGR announced Tuesday it had raised $15 million in venture funding led by European firm Balderton Capital. The startup, based in Cambridge, Mass., reportedly raised the funding at a $100 million valuation. --Written by Olivia Oran in New York. >To follow the writer on Twitter, go to http://twitter.com/Ozoran. >To submit a news tip, send an email to: firstname.lastname@example.org.