This is only a suggestion from NZServers
We suggest you carry out your own research
Google Authenticator is free and available on Playstore and Apple Apps.
Any 2FA is better than no 2FA.
It is easy to use.
There is no synch across different devices plus no pin or access from another device to delete/disable the app should you lose a cellphone.
You can backup the 2FA codes bearing in mind these are text files that are not encrypted.
For this reason, we suggest Authy 2FA.