One of the benefits of owning an iOS device is that updates are usually prompt. This means that when Apple releases an update, all their devices get it at the same time. This is versus Android where unless you own a Pixel phone, there is a good chance you will only get the latest version of Android a few months after its release.
This is why it doesn’t really come as a surprise to learn that following the release of iOS 13, Apple has disclosed that more than half of iPhones out there are already running on the latest version of the software. To be more specific, 55% of iPhones that were launched in the past four years are now powered by iOS 13, but if all compatible iPhones are put into consideration, it would still be at 50% – which is somewhat a respectable amount of number given that the software was launched barely one month ago.
It is expected that those numbers should increase over time as more users start to upgrade their devices. The latest iOS release is iOS 13.1.3 which was made available a few days ago.