U.S. Android users average 138 minutes per day on smartphones

Google Android smartphone owners in the United States averaged 138 minutes of use per day in May 2014, a 20 percent increase from December 2013, according to the Strategy Analytics' AppOptix platform. The study was based on more than one million application sessions used by 1500 Android smartphone users, with Facebook, YouTube and Messaging apps capturing 50 percent of the total time alone.

In addition, LifeStyle, Productivity, and News, Weather & Sports are popular - with mobile use continuing to rise.

"The three big categories are social, communication, and browsing - together they account for nearly a third of the time spent," said Bonny Joy, Consumer Telemetry Platform chief, said in a press statement. "Our analysis on the top 25 apps across each of the categories shows games and lifestyle segments are among the most vulnerable in maintaining mindshares as they are quick to come and disappear from our rankings."

Smartphones and tablets continue to cannibalize the PC industry, as users become more familiar with using mobile technologies.