While ad fraud doesn’t get the same attention as phishing and malware attacks, it operates at a massive scale, and it downgrades your experience on your phone and on the apps you use. It also generates millions in fraudulent revenue for attackers, and those funds are often put to much more dangerous use.

Google quietly ditched the Play Store’s app-sharing feature in a recent update. The feature was supposed to be removed in a December update, but it oddly stuck around until now. It was a lifesaver for users with little to no internet,