https://www.buyserviceusa.com/product/buy-ios-app-reviews/ from BuyServiceUSA's blog

What is IOS? IOS called a mobile operating system. that is developed by Apple Inc. It is the 2nd most popular mobile operating system globally after the Google operating system Android. It is the operating system that presently powers many of the company’s mobile phone devices, including the iPhone, and iPad Touch. IOS operating system is the most popular in the world. they have 13.28% of operating system market share worldwide. IOS launched millions of apps in the IOS store.

IOS and android both are mobile operating systems. Android created by google and IOS created by Apple Inc. The  IOS is the closest system whereas Android is more open. android system is available for many manufacturers such as Samsung, LG, etc. But iOS is controlled by Apple and there is no quality problem. The android applications are obtained from google play store but iOS applications are available in the Apple app store.