App endured a major outage and user backlash over perceived censorship. Now it’s facing an inquiry by the California governor and an ascendant competitor

A little more than one week ago, TikTok stepped on to US shores as a naturalized citizen. Ever since, the video app has been fighting for its life.

TikTok’s calamitous emigration began on 22 January when its Chinese parent company, ByteDance, finalized a deal to sell the app to a group of US investors, among them the business software giant Oracle. The app’s time under Chinese ownership had been marked by a meteoric ascent to more than a billion users, which left incumbents such as Instagram looking like the next Myspace. But TikTok’s short new life in the US has been less than auspicious.