Tests Show Free Android Antivirus Programs Don't Work

A report from AV-Test, a well-known security software testing lab in Germany, says that free antivirus products for Android don't work well. In the lab's tests, many didn't find a single malware file scanned by them.
AV-Test gathered seven free products: Creative Apps Antivirus Free, GuardX Antivirus, Kinetoo Malware Scan, LabMSF Antivirus beta, Privateer Lite, and Zoner AntiVirus Free. Compared to two commercial Android AV products tested, F-Secure Mobile Security and Kaspersky Mobile Security, the free products were dismal failures.

The products had big differences in scanning capability. Some could only scan built-in storage, not SD cards. This isn't necessarily a problem because code can't execute directly off removable storage. In static scans of 83 Android installation packages (APK) and 89 Dalvik binaries (DEX), none of them more than five months old, only Zoner AntiVirus Free found more than 10% of the malware--32% to be specific. Four of the products found none at all. Zoner did much better in detection of malware at install time, finding 80%, or 8 out of 10. Three of the other six products found 10% or one in 10, and the other three found none at all. F-Secure and Kaspersky found all threats.

Some of these products are extremely popular. The Market website says one of them, Creative Apps Antivirus Free, has millions of installations. Many free antivirus products on the PC have excellent reputations and protect well, but these come from established AV companies that are using the free versions to sell pay versions with extra features. The free Android AV products might not have that advantage.