iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. … Unveiled in 2007 for the first-generation iPhone, iOS has since been extended to support other Apple devices such as the iPod Touch (September 2007) and the iPad (January 2010).

What is my iOS version?

You can check which version of iOS you have on your iPhone, iPad, or iPod touch via the Settings app. To do so, navigate to Settings > General > About. You’ll see the version number to the right of the “Version” entry on the About page.

What does update to iOS mean?

When you update to the latest version of iOS, your data and settings remain unchanged. Before you update, set up iPhone to back up automatically, or back up your device manually.