Some U.S. TikTok users have flocked to the Chinese social media app Xiaohongshu, or RedNote, in protest of the looming ban.

As the potential ban on TikTok, a cultural sensation, approaches, here’s what you need to know about Xiaohongshu and other apps that social media users are considering.

Ahead of a potential ban this Sunday, Xiaohongshu, which is also known as Red Note or Booktok, quickly became the most downloaded free app on the U.S. App Store on Tuesday, surpassing Lemon8, a social network app that is also owned by TikTok parent ByteDance.