One week following the start of the public rollout on September 18th, adoption of iOS 7 in North America reached levels close to 52%. This bests the impressive adoption rate of iOS 6 in the same time period last year.

UPDATE 2 (9/25/13): By the afternoon of September 25th, 2013, one week following the release of iOS 7, over 51% of North American iOS-based Web traffic was generated by iOS 7 users, again outpacing iOS 6 over the same time period.

UPDATE 1 (9/20/13): By the afternoon of September 20th, 2013, 48 hours following the release of iOS 7, nearly 32% of North American iOS-based Web traffic was generated by iOS 7 users. This outpaces iOS 6, which took about three days to cross the 30% threshold.

ORIGINAL POST (9/19/13): On September 18th, 2013 Apple pushed iOS 7 live, making updates available over-the-air and through iTunes. Aside from a new look and feel, the latest version of Apple’s mobile operating system offers a significant number of new features; such as control center, automated app updating, and AirDrop, among others. Many of these new features were well received by users, and demand on Apple’s servers caused some to experience very slow download times or errors on launch day. While the OS itself seems to be a welcome change for Apple’s users, how did the server load, along with slightly narrowed eligibility for the upgrade impact iOS 7 adoption as compared to iOS 6?

After being available to consumers for just under 24 hours, Chitika Insights tapped into Chitika Ad network data to answer this question. To determine the success of Apple’s latest mobile operating system, Chitika Insights tracked the adoption rate of iOS 7 across all iOS devices.

To quantify this study, Chitika Insights examined a sample of millions of North American iOS-based online ad impressions from within the Chitika Ad network, ranging from September 18th to September 19th 2013. The growth rate of iOS 7 was then compared to total iOS Web usage using a time series to illustrate the rate of adoption of the new OS. For comparison, we overlaid the 24-hour iOS 6 adoption data we catalogued last year. Graphs depicting both data sets can be seen below:

Pre-release iOS 7 exhibited low levels of usage due to beta-version activity from developers. Following iOS 7’s public release the afternoon of September 18th, adoption levels soared despite high loads on Apple’s servers. About 24 hours following the start of the public rollout, adoption reached levels above 18%. This level of adoption represents another proverbial feather in the cap of Apple, as it bests the impressive adoption rates of iOS 6 in the same time period last year. For some competitive comparison, Google reports that as of September 4th, 2013, adoption of Jelly Bean, which was released in July 2012, comprises about 45% of the Android ecosystem. Judging by past trends, it’s likely that iOS 7 will surpass that mark very soon.