There's an elite club among Android apps: those chosen few that have been consumed by enough people to surpass the 1 billion installs mark. Most of the names found on this list come from Mountain View. Gmail was the first to cross the threshold (discounting Google Play services, which comes pre-installed on every Android device with access to the Play Store), followed by Maps and YouTube. Facebook has also passed the milestone, though I'm not sure how many of our readers are particularly happy about that one. Now the Google Search app has joined the ranks.
The Google Search app includes Now, the Google Now Launcher, and Voice Search. For this reason, it's actually surprising that it has taken this long. Nevertheless, Search has managed to outpace other staples such as Chrome and Hangouts.
But considering that all of these apps continue to come pre-installed on millions of Android devices, it shouldn't be too much longer before we see all of them hanging out on this side of a billion together.