TikTok is a Chinese video-sharing social networking service owned by ByteDance, a Beijing-based internet technology company founded in 2012 by Zhang Yiming. It is used to create short dance, lip-sync, comedy and talent videos. ByteDance first launched Douyin for the China market in September 2016. Later, TikTok was launched in 2017 for iOS and Android in most markets outside of China; however, it only became available in the United States after merging with Musical.ly on 2 August 2018.
TikTok and Douyin are similar to each other, but run on separate servers and have different content to comply with Chinese censorship restrictions. The application allows users to create short music and lip-sync videos of 3 to 15 seconds and short looping videos of 3 to 60 seconds. After merging with Musical.ly in August, downloads rose and TikTok became the most downloaded app in the US in October 2018, the first Chinese app to achieve this.
In 2019, media outlets cited TikTok as the 7th-most-downloaded mobile app of the decade, from 2010 to 2019. It was also the most-downloaded app on the App Store in 2018 and 2019.