The above numbers showed the adoption rates for iOS on iPhone models introduced over the last four years. If we look at all currently active iPhone models, 77% of them are using a version of iOS 17. 14% of all iPhones in use today are powered by an iOS 16 build, and 9% of these iPhones have a version of iOS 15 or older installed. It would be interesting to know the oldest version of iOS that is currently still being employed on an iPhone.
![The most recent iOS adoption rates - Apple reveals the latest iOS 17 and iPadOS 17 adoption figures](https://m-cdn.phonearena.com/images/articles/415622-image/soisauce-a.jpg)
The most recent iOS adoption rates
Now suppose we turn our attention to the iPad. 77% of all iPad models introduced over the last four years are powered by an iPadOS 17 build of the operating system. 15% of these tablets are equipped with a version of iPadOS 16 while 8% have an older iPadOS build installed.
Looking at all active iPad models, 68% are running a version of iPadOS 17, while a build of the iPadOS 16 operating system drives 17% of active iPad models. 15% are powered by an older iPadOS build.
All of the data is based on iPhone and iPad models that completed a transaction on the App Store this past Sunday, June 9th.