Antivirus protection is important to have installed on any of your devices.  Here are some sites that may help you choose good protection:

 

Android devices: (Avast, 360 Security, eset, Avira, AVL)

 

IOS (Apple):  (Lookout, McAfee, MobiShield, Norton, Trend Micro, Avira AntiVir, F-Secure SAFE, VirusBarrier)