https://thenextweb.com/security/2019/10/07/android-stalker-app-cases-increase-by-373-in-2019/

Stalkware apps — software used to spy on users’ messages, call information, and GPS locations — have increased a staggering 373 percent during the first eight months of 2019 when compared to the same period the year before.

The findings, disclosed by cybersecurity firm Kaspersky, found 37,532 users who encountered such apps at least once, a 35 percent jump year over year.