Another top protection option is AVG Antivirus & Security for Android. It got top marks from AV-Test with 100 percent protection for the real-time and widespread malware tests. Over at AV-Comparatives, however, the detection rate was 99.6 percent, with one false positive. That’s partially why we’re putting it down here in third place. Another downside is that it uses personalized advertising to support it, while the others don’t.

Despite that annoyance, however, there’s a lot to like about AVG’s free Android app. It can scan apps and files, clean-up junk files, and scan your current Wi-Fi network. it also has malicious website protection, a “RAM booster” that kills background apps, a Wi-Fi speed test, and an anti-theft feature for tracking and securing your phone remotely. That last feature requires an AVG account.

If you prefer Avast, which owns AVG, that app is good too. It had the same protection scores as AVG and pretty much the same feature set for free.