Apple released iOS 11 back in September, but its adoption rate has been slower compared to iOS 10, which launched last year. Back in October, Mixpanel reported that iOS 11 was running on 55 percent of devices, while Apple pegged it at around 52 percent last month.
According to latest numbers from the company's App Store support page for developers, iOS 11 is now running on 59 percent of devices. Additionally, 33 percent of devices are still running on iOS 10, while eight percent are still on older versions of the mobile operating system.
A possible reason for the slower adoption rate is the number of issues that have been reported ever since the operating system was released to the public.
Another bug emerged earlier this week, when users reported that SpringBoard on their devices was continuously crashing on December 2. This resulted in Apple releasing iOS 11.2 ahead of schedule, which had the unfortunate effect of breaking FaceID for users running the update on the iPhone X. The newer iteration also introduced Apple Pay Cash for users in the United States, a feature which wasn't activated until yesterday.