The initial uptake for Apple’s iOS 8 has been less than half of its predecessor, iOS 7, an online ad network said today, citing North American traffic.

In the 24 hours since its mid-day Wednesday launch, iOS 8 powered just 7.3% of all iOS devices that accessed Chitika’s ad network, the company said in an email. “iOS 8 adoption has been remarkably slower than either iOS 7 or iOS 6,” said Andrew Waber of Chitika.

Waber compared the 7.3% of iOS 8 against last year’s iOS 7, which collected an 18.2% share of all iOS devices in the first 24 hours after its debut on Sept. 18, 2013. iOS 6’s share was 14.8% after its first day.

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