Looking for a good free antivirus for iPad 4

Apple told me you don't need apps or anything for anti virus for using I pads, there system is good enough, don't pay for any as Apple support is very good when in their stores and its free assistance.
 
I didn't use iPad 4 but what I search and found Avast SecureMe is the best free antivirus software for iPad. What you guys give suggestion about it?
 
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