https://qooah.com/2012/12/02/comscore%ef%bc%9aandroid-%e4%bb%8d%e6%98%af%e5%b8%82%e5%a0%b4%e9%be%8d%e9%a0%ad%ef%bc%8cios-%e5%90%8d%e5%88%97%e7%ac%ac%e4%ba%8c%ef%bc%8c%e5%85%b6%e4%bb%96/