I am only an F-Secure user (their home solutions).
F-Secure SAFE application for iOS is not about ability to scan device. This is design for most (or even for "all") security applications under iOS.
Recent discussions about subject (ability to scan iOS devices):
Thus, it is normal that you can not scan for viruses on your iPad. And for more information about "why" (or some other thoughts) - some of provided community topics are useful.
In addition, F-Secure SAFE application for iOS with some other tweaks and options (in general, all of them are about things like :
About "How to uninstall":
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