Apps on PlayStore is not monitored by Google or anyone else for that matter. You can't let your guard down on these obscure apps because you downloaded them from official PlayStore:

http://www.infoworld.com/article/2610099/mobile-security/report--android-malware-and-spyware-apps-spike-in-the-google-play-store.html

Search for more info on these malware, some of them can't be completely uninstalled.