So, what will happen to users after that deadline? You won’t be able to download TikTok but it is unclear what will happen if you already have the app. One expert told CBS News that users will mostly likely get a black screen that says, “this service is not available in your country.”

The Supreme Court heard arguments for two-and-a-half hours on Friday over whether TikTok can be banned in the United States in less than one week. By the end, the justices appeared ready to allow the U.S. government to force TikTok's Chinese parent company to sell the company or go dark.

Mass., is leading a bipartisan effort to give ByteDance more than to sell the U.S. portion of TikTok before Sunday's deadline.