Android is a mobile operating system which is provided by Google LLC. It is based on the modified version of the Linux kernel and other open source software. It is specifically designed for touchscreen mobile devices like smartphones and tablets.
iOS is a mobile operating system which is provided by Apple Incorporation. It is mainly designed for Apple mobile devices like iPhone and iPod Touch. It was earlier known as iPhone OS. It is a Unix-like operating systems which is based on Darwin(BSD) operating system. It is the world’s second most used mobile operating system after Android.