With President-elect Donald Trump adding uncertainty around whether a TikTok ban will go into effect, the focus is now turning to companies like Google and Apple that are expected to take the popular video sharing app off their platforms in just two days.

TikTok is warning users Saturday that the app will be temporarily unavailable when the impending U.S. ban goes in effect Sunday.

China's ByteDance has called America's bluff on the future of TikTok, and it's beginning to look like a smart bet. State of play: U.S. politicians from both parties are scrambling to save the app's availability,

A law that prohibits mobile app stores and internet hosting services from distributing the video-sharing platform to U.S. users takes effect on Sunday.

NBC News reports that TikTok has boosted advertisements for Lemon8, an application also owned by ByteDance, in recent days. Rival social-media apps and websites such as Instagram, YouTube, and Snapchat are expected to increase their user base in the wake of a possible ban.