Following Google’s official Maps app hitting this big milestone earlier this year, the Facebook app has become the very first third party application to hit the 1 billion install mark on the Play Store. Not many apps ever reach this number, but with Facebook being the world’s most popular social network, it would make sense that Zuckerberg and Co. would be the first outside of Google to do it. Notably, this actually proves that Facebook is more popular than many of Google’s own offerings, including Chrome, Hangouts, and Google Search. Which of Google’s apps have hit the big billion? Maps, as mentioned, along with Google Play Services, Gmail, and YouTube have all beat Facebook.