So was this app at one point in time: https://www.theverge.com/2020/1/9/21058399/david-dobrik-disp...

It's called Dispo. You probably haven't heard of it because it became almost irrelevant a few weeks after launch. #1 on the app store doesn't mean a whole lot.

That’s an extremely recent development caused by the TT shutdown looming.

How many of those downloads originated in China? Genuine question, I read the article and it doesn't say. Apple's App Store is available in China, and China's population alone could be skewing those numbers.

Yes it's called a meme and it won't last.