ios

ios is worldwide used and it is very popular in our generation.I am fond of ios and iphone because when you use iphone to play games or search websites,you won't have to read advertisting.In addition,their app's quality are better than andriod's.

ios was built by apple(an famous american corporation).At first,it was called iphone os ,but in 2010 it was renamed as ios.

there have many useful function in ios  such as game center ,siri and facetime. they can bring convenience to us