IOS
iOS is a phone operating system that is given by Apple Incorporation. It's specially created for Apple mobile instruments like iPhone and iPod Touch. It was previously recognized as iPhone OS. It is a Unix-similar operating system that depends on Darwin(BSD) operating system. This is the most used mobile in the world after Android. It is specially developed in C, C++, Objective-C, council language, and Swift. The first demo of iOS was published in 2007.
Android
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