According to data from analytics site Sensor Tower TikTok has hit 1.5 billion total downloads across the App Store and Google Play. It hit 1 billion downloads in February of this year, and has raked in 614 million downloads so far this year – which Sensor Tower notes is 6% more than this time last year.

Much of TikTok’s growth has been driven by an explosion of users in India, who accounted for 31% of the app’s downloads. Its second-biggest market was China which made up 11.5% of downloads, then the US with 8.2%.

TikTok is becoming a growing threat to Facebook, especially given its popularity with the younger Generation Z, a demographic Facebook is eager to recapture. Sensor Tower reports that TikTok was the third most-downloaded app behind WhatsApp and Messenger, but came ahead of Facebook and Instagram.

Essentially, TikTok is the only app in the top five that isn’t owned by Facebook.