Apple Inc. and Google removed TikTok from their mobile app stores in the US as required by a law that took effect Sunday, after the social media company’s legal challenges failed to head off the measure passed last year to address national security concerns.

With President-elect Trump adding uncertainty around whether a TikTok ban will go into effect, the focus is now turning to companies like Google and Apple

TikTok stopped working in the United States late on Saturday and disappeared from Apple and Google app stores ahead of a law that takes effect on Sunday requiring the shutdown of the app used by 170 million Americans.