Every couple of months the members of the exclusive billion installs club have to roll out the red carpet as they introduce another app into their ranks. This time, they're welcoming two. The likes of Gmail, Facebook, and WhatsApp now have to say hi to Play Games and Talkback.

Play Games (which only launched in 2013) isn't as old as other Play apps such as Music, Movies, and Newsstand —but that hasn't stopped it from beating all three to the one billion installs mark. Now, before anyone gets too excited, that doesn't mean a billion people have all gone out of their way to install the app.

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