
These detect most other installed apps as potentially harmful, excluding only those with white-listed package names. Last year’s test showed that in addition to several apps that are equally ineffective at protecting the device against malware, there are other apps that employ dubious detection mechanisms. Worryingly, the app had been available on the Google Play Store, and thousands of users had paid money for it (although this was ultimately refunded to them by Google).

In reality, running the app simply showed a progress bar, supposed to represent scan progress, followed by an announcement at the end of the “scan” that the device was free of malicious apps.

AV-Comparatives’ 2017 test of Android antivirus products was inspired by the discovery of an Android app called Virus Shield, which claimed to scan mobile devices for malware, but in fact did nothing of the sort.
