Mark Zuckerberg has already made it clear he has no love for TikToK, but we now have an even clearer look at just why he's so concerned about the Chinese rival. In short: the app is growing like crazy, even by Facebook standards.

TikTok was downloaded more than 738 million times in 2019, according to analytics company Sensor Tower, beating out both Instagram and Facebook. In fact, there was only one app that was downloaded more, according to the firm: the Facebook-owned WhatsApp.

But while a Facebook property may hold the top spot, the report underscores just how big of a threat TikTok is to Facebook's dominance.  Read more...