A study by AV Test recently showed that paid for security apps work much better than free apps do. The study was done on the Android but AV Test claims it should be true for all smart phones. The study results showed that Kaspersky’s and F-Secure’s Mobile Security suites worked the best. They both were able to detect 50 percent of active malware samples used. The best free app was Zoner AntiVirus Free, which detected only 32 percent. Although the paid apps worked better, still 50 percent is not all that good. According to AV Test, a company that tests apps for security issues, suggests that you should avoid using apps from developers without a reputation. Also avoid apps that have no reviews or poor reviews. Also be leery of developers that don’t have a website. There’s a free android app called Lockout which PC WORLD suggests all Andriod users should have. It checks all apps against a malware blacklist and lets you know if it is suspect.
Here is the article and a link to a PC World best practices page.