IOS

iOS (formerly known as iPhone OS) is a mobile OS that created by Apple. It was released in June 29, 2007, along side with the iPhone 2G. This OS is used in Apple products for the iPhone, iPad and iPod Touch. iOS 7 is the first 64-bit version with new interface, while iOS 11 is the only a 64-bit version. iOS 13 was cut to 2 OSes (Regular iOS 13 for iPhone, iPod Touch and iPadOS for iPad).