Great product but for the person that will using it they just need to be able to keep track of master keys inside the app without backing anything up to the cloud. I doubt they'll spend even $5 for this use case.
Discussion
Hiya
Quite a bargain to maintain man over machine by design, along with having something where ‘communism’ makes them proud creating value rather than needing it.
Get that risk out of the way and own it.
🤔 
I think it'll depend on whether you fully trust an app--that's the benefit of hardware 2FA...but to each his own. For many (most?) convenience is more important than security.