iOS is a mobile operating system developed by Apple. Apple announced this system at the Macworld conference earlier on January 9, 2007, which was originally designed to the iPhone, and later set to iPod Touch, iPad. IOS is the same as the Apple's MacOS operating system, which belongs to the commercial operating system of class Unix. Originally, this system is named iPhone OS, because iPad, iPhone, iPod touch use iPhone OS, so 2010 WWDC announced that IOS (iOS is a registered trademark for US Cisco network equipment operating system, Apple rename has been authorized) . In January 2016, with the release of IOS 9.2.1, Apple repaired a vulnerability existing for 3 years. On 22 September 2018, US Apple secretly joined the trust rating feature based on iPhone users and other equipment users of the company in the latest operating system.
