FORTUNE — Apple (AAPL) and Samsung are both expected to launch new flagship smartphones in 2014. To get some baseline numbers in advance, the folks at the Chitika ad network have done a fresh analysis of iPhone and Galaxy usage in 2013.
Their report, issued Friday morning, is based on Apple and Samsung mobile ad impressions in the U.S. and Canada, several hundred million in all. Among its findings:
- Despite Apple’s larger installed base in North America, the 2013-model iPhone got snapped up almost twice as fast as the 2013 Galaxies. (See first chart.)
- Despite the slow pick-up of its new model, Samsung’s dominance of the North American Android market continues to grow. (Second chart.)
- Over the course of 2013, Apple’s share of mobile Web traffic, as measured by Chitika, grew to 67%, more than double Samsung’s. (Third chart.)