Millennial: Android Ad Impressions Grew 504 Percent in 2011; iOS Share Declined 7 Percent

After filing its S-1 for an IPO, the largest independent ad network Millennial Media is releasing a yearly report on on performance of smartphone operating systems on its network in 2011. Continuing its growth as a platform on Millennial's network, Android impressions grew 504 percent year-over-year. In 2011, Android had a 47 percent share of device OS impressions, while iOS had a 33 percent share. For basis of comparison, in 2010, iOS had the top spot with a 41 percent share, while Android made up 30 percent. iPhone impression share declined 7 percent year-over-year but maintained its position as the number one device on the Top 20 Mobile Phones ranking, with 15 percent of the impression share. Millennial says no other device has been able to achieve the same level of market share of the iPhone.

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