Speed wise, that's nearly as fast as Editors' Choice Bitdefender Mobile Security and Antivirus. The lack of performance impact was mirrored in my hands-on testing, in which I found that a Malwarebytes antivirus scan took an average of 12.98 seconds to complete, and grabbed just 0.7 percent of your total CPU power. Read Our ESET Mobile Security & Antivirus 2.0 (for Android) Review

Also disconcerting is the fact that Malwarebytes was one of only only three apps to return a false-positive detection. The average score for this round of testing was over 99 percent, meaning that AV-Test gave Malwarebytes a measly 2.5 out of 6 points for malware detection-the lowest score of the 31 security apps tested. That might sound like a very good score, but when the final results were published, it didn't look good for Malwarebytes. I received initial results from independent lab AV-Test (Opens in a new window), indicating Malwarebytes detected more than 90 percent of the malicious sample files used in the evaluation. Instead, I leave it to the professionals. I don't perform live malware testing when reviewing Android security apps, for safety's sake. The problem is, it's not so hot at the one task it tries to perform.

Malwarebytes eschews most of the bells and whistles included by other security developers, focusing on malware detection.

The developer has since expanded into the mobile world with an Android app version of Malwarebytes, available for the low, low price of nothing. Security experts know they can rely on Malwarebytes to clean up the mess when a computer is infested with viruses and other malware.

Low detection scores in independent lab testing.

Few features compared to other free offerings.

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