If you’re a fan of the iPhone or iPad, the iOS and iPadOS icon have become an instrumental element of your user experience.
That being said, the awesome nerds at the Logopedia section of the fandom.com website have put together the following gallery and timeline of Apple’s clock icon for the mobile operating systems:
This initial clock logo was used for the iPhone and iPod Touch from iPhone OS 1 in June 2007 to iOS 5 in August 2012.
This icon was only used for the iPhone and iPod Touch during the iOS 6 revision in September 2012. The minute and hour hands were rounded, as opposed to pointy, which was the look found in iOS 5 and below.
This logo was used only for the iPad during the iOS 6 revision in September 2012 and used the Swiss Railway clock design.
This icon debuted with the launch of iOS 7 in September 2013 and acted as a real clock based on the time of the device. In iOS 8.0 to 8.2, the minute and hour hands became bolder and longer. In iOS 8.3 to iOS 8.4.1, the minute and hour hands lost their boldness, but remained the same length as before.
This icon debuted with the launch of iOS 9 in 2015. In 2016, with the debut of iOS 10, the seconds hand turned from red to orange for easier visual identification.
This icon was used at the launch of iOS 11 in 2017. For iOS 12, the second hand became a darker shade of orange and the minute and hour hands became bolder.
With the launch of iOS 14, the hands became bolder and more pronounced and were made to match the iOS 14 Clock widget. The orange hand was also made darker.
Via Logopedia