iOS antivirus is a new concept to me. However, as one of the top two mobile operating systems it is inevitable that it will be targeted by malware and viruses. No matter how remote the prospect of an infection might seem it is always better to err on the side of caution and defend in depth.
Remember to protect both you iPhone and iPad.
There are other companies that make antivirus apps for a fee but I’m focusing here on the free stuff by reputable firms.
Avira – Free antivirus. German firm that has a good reputation.
Lookout – Free for iPhone. Reputable company. I do not know if this will also work on iPad.