Instagram surpasses TikTok, short videos drive downloads, says Sensor Tower. Instagram's monthly active users have reached 1.47 billion, an increase of 13 million.
Active TikTok users reached 1.12 billion, a decline of 12 million in the final three months of last year. However, the latter app continues to get higher engagement: Its users spent an average of 95 minutes in the fourth quarter of 2014, compared to 62 minutes on Instagram, 30 minutes on X and 19 minutes on Snapchat.