Sensor Tower, a tech platform that allows developers to gather usage data, has been collecting information about millions of users from apps such as VPNs and ad-blockers. Many of the apps the company owned were removed from the official app store for various violations. Sensor Tower said no personal data is collected from users and many of these apps no longer exists. There’s no indication that the practice of collecting data from such apps has stopped, so users should seriously think about who they are giving personal information to, even if it’s technically anonymized.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/some-vpn-apps-secretly-gather-anonymized-user-data/