As the fate of TikTok hangs in the balance, U.S. TikTok users are flocking to the Chinese social media app Xiaohongshu, also called RedNote – making it the top downloaded app in the U.S.

Launched in 2013 by entrepreneurs Miranda Qu and Charlwin Mao in Shanghai, Xiaohongshu combines the visual appeal of Instagram, the inspirational flair of Pinterest, consumer forums' detailed ...