Wavesecure

If you live and work out of your phone, this is the app for you. McAfee Wavesecure allows you to back up your data to a web portal and gives you the ability to restore it on command. The app also lets you lock your phone remotely and track its location via GPS.
Free trial available from iTunes and Android. $19.99 for a one year subscription.

GadgetTrak

If you’ve lost your device then this nifty app allows you to take a photo of the person using it and their surroundings, and a tracking function so you can sweep in Jack Bauer style to retrieve it. It also comes with a handy online portal for backing up data or wiping the device clean (if you have anything covert in there).
Free trial available on iTunes and Android. $19.99/year subscription for Android, $3.99 for iOS. www.gadgettrak.com

Webroot SecureWeb Browser

Smart phones are just as vulnerable to phishing sites as computers and without an anti-virus program it’s difficult to determine the security of the page. With Webroot SecureWeb browser, however, you can surf the net with a lot less anxiety. It blocks malicious sites to ensure you don’t wander into the wrong digital alley.
Free from iTunes.

DroidDream Killer

The DroidDream trojan nightmare in early 2011 left many Android users clamoring for the best anti-virus app they could get. DroidDream Killer has been one of the most successful in combating new derivatives of the virus and still remains a top choice for Android’s defense against malware.
Free from Android.