Sensor Tower: TikTok passed 1B downloads on Android and iOS, excluding Android installs in China; 663M downloads came in 2018, beating Instagram's 444M
Isobel Asher Hamilton / Business Insider :
Context & Ripple Effects
In early 2019, Sensor Tower's count put TikTok past one billion Android and iOS installs worldwide, excluding Chinese Android installs, after a 2018 in which its 663M downloads beat Instagram's 444M. The milestone marked the moment ByteDance's short-video app stopped being a regional phenomenon and started competing with the incumbent Western platforms on raw distribution.
The trajectory held: TikTok reached 1.5B downloads by late 2019, crossed 2B once its Chinese twin Douyin was counted in April 2020, and by mid-2021 had hit 3B installs — the first non-Facebook app to get there. Instagram's counter-moves, documented internally as a yearslong push to win back teens, read as a direct response to that curve.
First-order effects
- Instagram is now being out-downloaded by TikTok on an annual basis — 663M vs. 444M in 2018 — putting Meta's flagship photo app on the defensive for the first time in its category.
Second-order effects
- Instagram responds where the threat lives: internal documents show it adjusted its recommendation algorithm to favor teen-friendly content and boosted teen-oriented influencers in a deliberate campaign to retain younger users.
Third-order effects
- If the install curve holds, TikTok becomes the first app outside Facebook's portfolio to reach 3B installs — breaking the assumption that only the Facebook family could operate at that distribution scale.
The trend: Short-video apps are compounding install growth fast enough to displace Facebook-family platforms as the default mass-scale consumer social network.