As measured by the App Store on July 20, 2015, iOS 8 is now powering 85 percent of iPhone, iPod touch and iPad devices in the wild.
iOS 7 has dropped from fourteen percent of devices a month ago to thirteen percent of iPhones, iPads and iPod touches in the wild. Earlier iOS releases continue to comprise a meager 2 percent of installed hardware.
We've been tracking iOS 8 adoption rates for months now and to call this an impressive achievement would be an understatement given iOS 8 hit a mere ten months ago.