The latest Global Mobile Media Forecast by Strategy Analytics shows that in-app advertising reached $1.7 billion in Western Europe and the U.S., overtaking display ads on the mobile web at $934.5 million. According to the report, consumer spending on mobile media content including apps and services hit $121.8 billion in 2011. The app market was the second highest contributor to that figure behind data plans and mobile web browsing, with 23 billion apps being downloaded globally in 2011.