Unable to use bank app, Bank said someone tried to get in
is there an antivirus available for my IPad mini and iPhone? My bank sent me a message stating that someone is watching my info as I type. That my account has been tampered with. I don't use the Internet to sign-on to my account, I se the apps only to keep the security of my information. When I call my bNk they advise me to get an antivirus. I need help. I thought my Apple products were unable to be hacked . Please help me understand and fix this problem.
Thank you
iPad Mini, iOS 8.4.1