Apple’s Safari web browser has more than 1 billion users, according to an estimate by atlasVPN. Only one other browser has more than a billion users, and that’s Google’s Chrome. But at nearly 3.4 billion, Chrome still leaves Safari in the dust.

It’s important to note that these numbers include mobile users, not just desktop users. Likely, Safari’s status as the default browser for both the iPhone and iPad plays a much bigger role than its usage on the Mac.

Still, it’s impressive given that Safari is the only major web browser not available on Android, which is the world’s most popular mobile operating system, or Windows, the most popular desktop OS.