2015 US Market Smartphone Statistics
As of July 2015:
191.4 million people in the U.S. owned smartphones (77.1% mobile market penetration)
Apple 44.2%, Android 51.4%
Total user activity on smartphones and tablets accounts for 62% of digital media time spent, and apps alone now representing the majority of digital media time at 54 percent.
Source: comScore, Sept 2015