TikTok has restored services to its 170 million users in the US, after President-elect Donald Trump said he would give the app "extra time" when he takes office on Monday.
On Sunday, the Chinese-owned app stopped working for American users, following concerns that their data could be accessed by Chinese officials.
In a statement, TikTok later said it was in the process of "restoring service" just hours after it was halted in America.
TikTok thanked the President-elect for "providing the necessary clarity and assurance" and said they would work with Trump "on a long-term solution that will keep TikTok in the United States."
TikTok stopped working for its 170 million American users on Saturday evening shortly before the law to shut it down went into effect, citing national security reasons.
US officials had warned that under Chinese parent company ByteDance, there was a risk that Americans' data would be misused.
President-elect Donald Trump said he would "extend the period of time before the bans set out in the law take effect so that we can reach an agreement to protect our national security."
"I would like the United States to have over 50% ownership," he wrote on the social network 'Truth'.