According to a report from mobile ad network provider Opera Mediaworks (via ComputerWorld), Android devices received more ad traffic than iPhones and iPads for the first time ever in the first quarter of 2014. The data shows that Android devices, including both phones and tablets, accounted for 42.8 percent of mobile ad impressions, while iOS devices accounted for slightly lies at 38.2 percent.

iOS devices still led in terms of revenue, however, receiving 52 percent of ad revenue. Android devices climbed to 33.5 percent of revenue, up from 27 percent a year ago. In terms of location, the United States still drives the most mobile ad traffic with 50.6 percent. Asia-Pacific countries were second with 23 percent, and European countries came in with 13 percent.

The sheer volume of Android devices obviously helped¬†Google’s operating system take the crown for the most ad traffic. The IDC reported that Android smartphones made up 78% of all smartphones shipped, compared to 17.6% for iPhones. The fact that iOS led in revenue, however, still shows that iOS is still the more enticing operating system for developers and advertisers. For now.