A Chinese ad network named Mintegral is accused of spying on user activity and committing ad fraud in more than 1,200 apps with 300 million installs per month since July 2019. Mintegral is headquartered in Beijing, China, and is owned by another Chinese ad network, Mobvista, which has a head office in Guangzhou, China.
One of the apps, Helix Jump, has over 500 million total installs. Other popular apps that are impacted include Talking Tom, PicsArt, Subway Surfers and Gardenscapes.
All together, this likely impacts billions of total app installs on iPhone and iPad.