Users in the U.S. who opened the app were greeted with a message that read, "Sorry, TikTok isn't available right now."

TikTok said on Sunday it was restoring its service after President-elect Donald Trump said he would revive the app's access in the U.S. when he returns to power on Monday. "As a result of president Trump's efforts,

Even if temporary, the unprecedented shutdown of TikTok will have an impact on U.S.-China relations, domestic politics, the social-media marketplace and millions of Americans who depend on the app.

If it feels like TikTok has been around forever, that’s probably because it has, at least if you’re measuring via internet time.

As the U.S. ban on TikTok takes effect, a weather expert explains the conundrum it creates with risk and science communication.

The Supreme Court has unanimously upheld the federal law banning TikTok beginning Sunday unless it’s sold by its China-based parent company.

TikTok’s time in the United States is counting down. But Washington is only the latest government to impose restrictions on the video app.

President-elect Donald Trump publicly said Saturday that he will probably give TikTok a 90-day reprieve from a U.S. ban set to take effect Sunday, just before he takes office.

TikTok flickers back to life after going dark in the United States as the fate of the app hangs in the balance.

The deadline for ByteDance to sell the app is just days away. A new report suggests that Washington residents are concerned about the ban.

Trump has expressed interest in a joint venture that could keep TikTok operational over the long haul. For now, the app is back online.