Smartphone owners became the majority of mobile phone users for the first time this year, growing from 49 percent of mobile subscribers in Q1 2012, to 56 percent by Q3 2012. Mobile app usage also continued to grow. Among the top 10 mobile apps, Facebook Messenger grew the most among iPhone apps, and Twitter was the fastest growing Android app.

Google remained the top Web brand, with an average 172 million unique visitors each month between January and October 2012, followed by Facebook, which garnered an average of 153 million visits each month. Online video continued to grow in 2012, but YouTube remained the top online video source, averaging 132 million unique viewers during the year.

Nielsen  Top 10 iPhone Apps of 2012

ore info in the full article here.