Google announced today that there are now over 2.5 billion monthly active Android devices worldwide, up from 2 billion in 2017.

I heard about the new milestone during the Google I/O 2019 keynote address today. But the Android team tweeted about it as well, noting, “10 years and now over 2.5 billion active devices. Thanks for joining us on this journey.”

That’s strong growth, given the overall size of the platform and its market dominance. But growth has slowed a lot since 2017, as you might expect. During Google I/O 2017, Google was able to boast that Android usage had experienced 100 percent growth over the previous two years. This time around, Android usage has grown just 25 percent.

Still, 2.5 billion is 2.5 billion. And Android is, by far, the most popular personal computing platform on earth.