Why Android is the most popular?

Android powers hundreds of millions of mobile devices in more than 190 countries around the world. It’s the largest installed base of any mobile platform and growing fast—everyday another million users power up their Android devices for the first time and start looking for apps, games, and other digital content.

How did Android become popular?

The key decision in Android history was Google’s commitment to make Android an open-source operating system. That allowed it to become highly popular with third-party phone makers. Just a few years after the launch of Android 1.0, smartphones powered by the new OS were everywhere.