Are there any applications whose only task is to spy on the user? Yes – until recently, these were still widely available programs on Google Play. Anyone could download and install them on the victim’s phone. What’s more, these applications concealed their presence and could be used to spy on the user.

https://www.cybersecurity-insiders.com/monitorminor-app-is-a-stalkware-lurking-in-google-playstore/