Microsoft recently confirmed that its Windows Phone operating system is over and done. That means when it's time to buy a new smartphone, there are basically only two operating systems a consumer can choose from: iOS or Android.
The two have a sort of duopoly on the smartphone market.
Apple released the first iPhone in 2007, and a little over a year later Google unveiled its first Android phone. The big smartphone battle has mostly remained between the two platforms ever since. It might simply be because they were the biggest initial innovators in the market.