Apple’s iOS is what is found on every iPhone. As of 2019, the latest version was iOS 13. A new version is released in Q4, while it’s announce in late Q2 at WWDC with a developer and open beta following in Q3.
Apple will release iOS 14.5 update with AirTag support next week
Asidre from adding support for Apple’s object tracker, iOS 14.5 will finally enable the ability to unlock your iPhone using Apple Watch.
In December 2020, the Apple Developer website stated that 81 percent of all iPhone models and 75 percent of all iPad models released in the previous four years were running iOS 14 and iPadOS, respectively.