When Apple announced on Monday that it had sold a record 9 million iPhones during the launch weekend for the new iPhone 5s and 5c, it also said that around 200 million iOS devices have been updated to iOS 7 since the update was released less than a week before on Sept.18. Apple said it was the “fastest software upgrade in history”, but didn’t compare iOS 7 adoption to previous releases.

Mobile app marketing platform Fiksu has been tracking millions of iPhones hourly since the launch of iOS 7 and it’s latest numbers show iOS 7 adoption is much higher than previous releases. Fiksu has iOS 7 usage at almost 58 percent just 7 days after release, compared to under 47 percent iOS 6 had in the same timeframe and 27.2 percent of devices for iOS 5. That almost 60% share for iOS 7 is up from the 30 percent estimated by Mixpanel less than 24 hours after the release of iOS 7.

Mixpanel and other tracking services also have iOS 7 adoption at around 60% as of today.

Fiksu is tracking usage of the new iPhone models as well and reports iPhone 5s currently makes up 1 percent of their sampling versus 0.3 percent for the iPhone 5c:

Earlier this week web analytics company Localytics estimated that the 5s accounted for around 78% of new iPhone models sold globally, but a new report this morning from the reliable Mingchi Kuo estimates sales of the new models are closer to a 50/50 split.

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