The full scope of how the ban would impact TikTok’s user functions is still unclear, as a lawyer arguing on behalf of the app said it would go dark by Jan. 19.

The law that took aim at TikTok over national security concerns has prompted Americans looking for alternatives to download Xiaohongshu, a social media app that is popular in China.

Chinese social media app RedNote, known in China as Xiaohongshu, gained nearly 3 million U.S. users in one day earlier this week as a flood of self-proclaimed "TikTok Refugees" joined, according to new data from analytics firm Similarweb.