Smartphones have become an integral part of Twitter and Facebook use: 33% of smartphone owners who use Twitter say they read tweets primarily via their smartphone, and 33% of such consumers send tweets primarily via their mobile device, according to a survey from Compete.

Another 38% of surveyed smartphone users say they send tweets via both their smartphone and their computer, whereas only 17% do so primarily via computer.

Twitter's mobile strategy and integration with SMS (short message service) has made the site a natural mobile player since its inception. But Facebook is also benefiting from its mobile strategy.

Among smartphone owners who access Facebook via their mobile device:

• 14% say they read news feeds on Facebook primarily via their smartphone; 52% use both their computer and their smartphone to do so.
• 14% post status updates on Facebook via smartphone; 46% use both their computer and their mobile device to do so.
• 12% reply to status updates on Facebook via smartphone; 46% use both their computer and their mobile device to do so.

Below, other findings from the Q1 2010 Smartphone Intelligence survey, which provides behavioral and survey-based insights into how consumers use smartphones.

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Social Networking Adoption, by Mobile Device

Smartphone users have high levels of social networking adoption:

• 85% of Android phone owners say they have a Facebook account, and 73% of Android phone owners access that account via their smartphone.

• 82% of Blackberry owners use Facebook, but just 56% of Blackberry owners access it via their mobile device.
• 79% of iPhone owners use Facebook, and 68% of iPhone owners do so via their smartphone.

Moreover, fully one-third (33.6%) of smartphone owners say they have a Twitter account, and 19% of smartphone owners access it via mobile. Among BlackBerry owners, 30% use Twitter and 14% do so via their smartphone.

Other findings from the Compete survey:

• Mobile Gaming: iPhone owners download more games and play games more frequently than owners of other smartphones: 51% of iPhone users say they have five or more games loaded on their smartphones and 37% play such games on their smartphones at least daily, with puzzle games garnering most of their attention.
• Local search: Nearly one in three smartphone owners has called or stopped into a local business after finding it using a local-search application. In 1Q10 alone, close to one-third of Android phone and iPhone owners discovered at least two new businesses they were not previously aware of as a result of using local-search applications.

Mobile Social Networking Climbing Fast

As of January 2010, 30.8% of US smartphone owners accessed social networking sites via mobile browser, up 8.3 percentage points from 22.5% a year earlier, according to separate research from comScore.

Twitter attracted an average of 4.7 million mobile monthly users during that period, up 347% from a year earlier. Similarly, 25.1 million mobile users accessed Facebook monthly via mobile browser, up 112% from a year earlier.

About the data: Findings are based on Compete's Smartphone Intelligence survey among 1,600 smartphone owners, conducted from January to March, 2010.