Data: AppTopia; Note: Musically became TikTok in the U.S. on Aug. 2, 2018; Table: Axios Visuals
The U.S. government's threat to ban TikTok takes aim at what has become the most popular smartphone app in the country.
Why it matters: TikTok’s scale presents an enormous challenge to lawmakers trying to argue that the app's national security threat outweighs the wishes of the millions of people and businesses that use the app.
