According to eMarketer, mobile now accounts for 12 percent of Americans' media consumption time, triple its share in 2009.

Where is this consumer attention being focused?

The biggest beneficiaries have been mobile apps. Time spent on apps dwarfs time spent on the mobile Web, and smartphone owners now spend 127 minutes per day in mobile apps.

In a new report from BI Intelligence, we analyze the main mobile usage trends developers and publishers should consider to be successful in mobile, detail how users are consuming content on their mobile devices, take a look at the most popular mobile activities, and examine how mobile usage is an additive activity.

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Here's a brief breakdown of the most important mobile usage trends:

The report is full of charts and data that can be easily accessed, downloaded, and put to use.