As of December 18, iCloud backups require iOS 9 or later, ending support for iOS 8 and earlier.Devices running iOS 8 or earlier can still create manual backups on a Mac or PC.The latest iOS version is 18.2, supporting iPhones since iPhone XS and iPads since the 7th generation.CloudKit, implemented from iOS 9 onwards, enhances data management and user authentication for iCloud backups.