A message reading "Sorry, TikTok isn't available right now" is displayed from the TikTok app on a cell phone screen on Saturday, Jan. 18, 2025, in Los Angeles, Calif.Andy BaoAPBy HALELUYA HADERO / APJanuary 19, 2025 6:05 AM ESTNEW YORK Millions of TikTok users in the United States are no longer able to watch videos on the social media platform as a federal ban on the immensely popular app takes effect.The company's app was removed Saturday evening from prominent app stores, including the ones operated by Apple and Google, while its website told users that the short-form video platform was no longer available. The blackout began just hours before the law took effect.Users opening the TikTok app on Saturday encountered a pop-up message preventing them from scrolling videos that read, Sorry, TikTok isn't available right now."A law banning TikTok has been enacted in the U.S., the message said. Unfortunately that means you cant use TikTok for now.We are fortunate that President Trump has indicated that he will work with us on a solution to reinstate TikTok once he takes office, the notice continued, in a reference to President-elect Donald Trump's pledge to save the platform. The company told its users to stay tuned.The only option the message gives to U.S. users is to close the app or click another option leading them to the platform's website. There, users are shown the same message and given the option to download their data, an action TikTok previously said may take days to process.Before the announcement went out, TikTok said in another message to users that its service would be temporarily unavailable and the company was working to restore its U.S. service as soon as possible." But how long the platform will remain dark is unclear.Apple said in a statement on its website that TikTok and ByteDance apps were no longer available in the U.S., while visitors to the country could have limited access. Apple is obligated to follow the laws in the jurisdictions where it operates, the company said.If you already have these apps installed on your device, they will remain on your device. But they cant be redownloaded if deleted or restored if you move to a new device. In-app purchases and new subscriptions are no longer possible, the statement said, adding that the change could impact performance, security and compatability with future versions of iOS and iPadOS.TikTok CEO Shou Chew posted a video thanking Trump for his commitment to work with the company to keep the app available in the U.S. and a strong stand for the first amendment and against arbitrary censorship.We are grateful and pleased to have the support of a president who truly understands our platform. One who has used talk to express his own thoughts and perspectives, connecting with the world and generating more than 60 billion views of his content in the process, Chew said.In an interview with NBC News on Saturday, President-elect Donald Trump said he was thinking about giving TikTok a 90-day extension that would allow them to continue operating. If such an extension happens, Trump who once favored a TikTok ban said it would probably be announced Monday, the day that he is sworn in as president. TikTok CEO Shou Chew is expected to attendTrumpsinauguration with a prime seating location.In Washington, lawmakers and administration officials have long raised concerns about the app, which they see as a national security threat due to its Chinese ownership. TikTok is owned by ByteDance, a technology company based in Beijing that operates the well-known video editing app CapCut and Lemon8, both of which were also unavailable for service Saturday evening.The federal law required ByteDance to cut ties with TikTok by Sunday or face a nationwide ban. The statute was passed by Congress in April after it was included as part of ahigh-priority $95 billion packagethat provided foreign aid to Ukraine and Israel. President Joe Bidenquickly signed it, and then TikTok and ByteDance quickly sued on First Amendment grounds.While defending the law in court, the Biden administration argued it was concerned about TikTok collecting vast swaths of U.S. user data that could fall into the hands of the Chinese government through coercion.Officials have also warned the algorithm that fuels what users see on the app is vulnerable to manipulation by Chinese authorities, who can use it to shape content on the platform in a way thats difficult to detect. But to date, the U.S. has not publicly provided evidence of TikTok handing user data to Chinese authorities or tinkering with its algorithm to benefit Chinese interests.The Supreme Court unanimously decided on Friday the risk to national security posed by TikTok's ties to China overcomes concerns about limiting speech by the app or its 170 million users in the United States.After TikTok's service started going dark, some in China slammed the U.S. and accused it of suppressing the popular app. In a post on the Chinese social media platform Weibo, Hu Xijin, a former editor-in-chief for the Chinese Communist Party-run newspaper Global Times, said TikToks announcement to halt services in America marks the darkest moment in the development of internet."A country that claims to have the most freedom of speech has carried out the most brutal suppression of an internet application, said Hu, who is now a political commentator. TikTok does not operate in China, where ByteDance instead offers Douyin, the Chinese sibling of TikTok that follows Beijings strict censorship rules.After the court ruling, both White House Press Secretary Karine Jean-Pierre and Deputy Attorney General Lisa Monaco said the Biden administration would leave the laws implementation to President-elect Donald Trump given that his inauguration falls the day after the ban takes effect.But TikTok said on Friday evening it will be forced to go dark if the administration didnt provide a definitive statement to the companies, such as Apple, Google and Oracle, that deliver its service in the U.S.White House Press Secretary Karine Jean-Pierre called TikToks demand a stunt and said there was no reason for TikTok or other companies to take actions in the next few days before the Trump administration takes office. But despite those statements from the administration, confusion lingered about what would happen until TikTok began blocking its service.Under the law, mobile app stores are barred from offering TikTok and internet hosting services are prohibited from delivering the service to American users. Violators could incur fines of up to $5,000 for each user who continues to access TikTok, meaning penalties the companies could face if they continue offering TikTok could total to a large sum.As its written, experts said the law does not require TikTok to take down its platform, so its unclear if the company voluntarily shut it down or was unable to continue the service alive after losing access support from its tech providers. The company did not respond to questions sent this week about its plans.The statue allows the sitting president to extend the deadline by 90 days if a sale is in progress. But no clear buyers have emerged, and ByteDance has previously said it wont sell TikTok.On Saturday, artificial intelligence startup Perplexity AI submitted a proposal to ByteDance to create a new entity that merges Perplexity with TikTok U.S. business, according to a person familiar with the matter.Perplexity is not asking to purchase the ByteDance algorithm that feeds TikTok users videos based on their interests and has made the platform such a phenomenon.Other investors have also been eyeing TikTok. Shark Tank star Kevin OLeary recently said a consortium of investors that he and billionaire Frank McCourt put together offered ByteDance $20 billion in cash. Trumps Treasury Secretary Steven Mnuchin also said last year that he was putting together an investor group to buy TikTok.Associated Press writer Kanis Leung contributed to this story from Hong Kong.More Must-Reads from TIMEL.A. Fires Show Reality of 1.5C of WarmingHome Losses From L.A. 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