Beijing-based mobile app analytics service App Annie today announced $15 million Series C funding led by Sequoia Capital’s US fund and joined by existing investors IDG Capital Partners, Greycroft Partners, e.Ventures, and Infinity Venture Partners. The company raised Series A funding from IDG in 2011, and another $6 million in August 2012. Launched in March 2010, to date App Annie has analyzed over 25 billion downloads and more than $6 billion in app store revenues. Incorporated in Hong Kong and based in Beijing, App Annie has become a successful global business with offices in San Francisco, Beijing, Hong Kong, London, Seoul, and Tokyo. Bertrand Schmitt, CEO of App Annie, once shared on how to build a China-based global startup and find the funding from China-based investors or those outside China.