TikTok surpassed two billion mobile downloads worldwide in April 2020.
Mobile-app analytics firm Sensor Tower reported that TikTok passed the two-billion-download milestone in April 2020, with the milestone publicized on April 29. The figure covered worldwide mobile downloads and excluded Android installs in China, where ByteDance operates the separate Douyin service.
The milestone reflected TikTok's rapid international expansion. ByteDance launched TikTok outside China in 2017 and merged it with the existing Musical.ly user base in August 2018. That merger helped give TikTok a large audience in markets beyond mainland China.
Downloads are not the same as unique users: one person can install an app more than once, and app-store estimates do not necessarily represent active accounts. TikTok later reported reaching one billion monthly active users in September 2021, a different measurement from the two-billion-download figure.