Conversation

Third Party Tracking in the Mobile Ecosystem: "This paper presents an empirical study of the prevalence of third-party trackers on 959,000 apps from the US and UK Google Play stores. We find that most apps contain third party tracking, and the distribution of track- ers is long-tailed with several highly dominant trackers accounting for a large portion of the coverage."
https://arxiv.org/pdf/1804.03603.pdf
My favourite site is still by @exodus
https://reports.exodus-privacy.eu.org/
Comprehensive. Digestable. Linked.