Hmm… there are multiple confusing bits in this sentence. VivoKey OTP is a deployable software applet that can only be installed on the Flex One beta units shipped out to certain people in the private beta program. To use it, you need the VivoKey Authenticator smartphone app, which is separate from the VivoKey app. Google Authenticator is a separate OTP smartphone app that does not work with VivoKey or even NFC if I recall correctly.
If you want to program a new OTP key into your VivoKey OTP applet on your Flex One beta unit, you have to scan the QR code or manually enter the key, then NFC scan your Flex One… it will deposit the key into the internal OTP keychain. Upon subsequent scan it will generate and display codes for all OTP keys stored in the Flex One.