When I first purchased bitdefender and installed on my laptop and my iphone. It seemed to cause all sorts of troubles especially when connecting phone to laptop/itunes and trying to install update and backup.
The below website will give you all the required information in relation to bitdefender iOS product
https://www.bitdefender.com/solutions/mobile-security-ios.html
Regards
Flex
(Bitdefender beta tester 2019/ 2020)