Android apps with millions of downloads have been found running ads constantly, draining battery and causing all sorts of other problems for users.
The Mobile Research Team at antivirus vendor McAfee discovered 43 apps of this kind and reported them to Google for violation of Play Store policies. They have now been removed from the store.
The apps, usually streaming or news based in nature, mainly targeted Korean users. The adware they contain can lead to users being profiled, as well as consuming their data and draining their battery.