iOS 9 adoption stuck at 77%
iOS 9 is reportedly on 77% of Apple devices as of February 22, 2016, which is the same percentage as the last check-in. The way Apple measures is somewhat strange: it's based on the devices that checked in to the App Store on one specific day. It's strange because Google gathers its data over the course of a two week span of devices checking in to the Play Store. It may be that Google doesn't need to use a two week span, but we can't say one way or the other.
2.1, meaning we don't know how many users have the latest security patches, which is usually a talking point of Apple when it comes to Android version numbers. So it goes.Of course, as per usual, Apple only shows the stats for iOS 9 alone. We also have no idea how many users are on iOS 9.0, 9.0.2, 9.1, 9.2, or 9.