Apple products are known for their solid build quality in both software and hardware. I’ve used many other operating systems such as Android and Windows Phone but none of them lived up its glory. While these OS get updated occasionally, their performance and the level of smoothness are far behind their Apple counterparts.
The creation of iOS (or iPhone OS between 2007 and 2010) has changed the outcome of the mobile industry. It took down Symbian OS, BlackBerry OS and Windows Mobile while positioning Apple onto the smartphone podium. Mostly importantly, iOS inspired the creation of its biggest rival, Android.