iOS versions: Explore every iOS version from day one to today

Macworld iOS is at the heart of the iPhone experience. It’s the operating system on which everything else sits, while also delivering plenty of features and dedicated apps built by Apple itself. Every year (usually in September) Apple adds new features to compatible iPhones with an update to iOS, and in the months that follow more features arrive. If you want to know what the latest version of iOS is, or if you’ve ever wondered about when versions came out and what features they brought, we will answer your questions. We also show you how to check which iOS you’re currently using and how to update to the latest iteration. The latest version of iOS is iOS 26, which brings a brand new look and lots of new features. iOS 26 arrived in September 2025 and subsequent updates to iOS 26 have added new features. As of March 2026 we are at version iOS 26.4. iOS version history: Every iOS and the features it brought There are significant milestones scattered across the