36 percent of active iOS devices are already using iOS 7 according to information published by Mixpanel, a mobile analytics firm. Apple has frequently touted the rapid adoption of new operating system upgrades as a significant strength of its mobile operating system, ensuring that developers who adopt new APIs and features like iCloud or Passbook will see a large market for their wares. For comparison, ad network Chitika currently estimates iOS 7 adoption at just 18 percent, showing the serious variances in estimating iOS upgrade patterns. After the iOS 6 laun
