Kiwi Farms

I want to compete with Russell Greer by publishing on Kindle, but can't get past the two-stage authentication process as I do not own a mobile phone, or any kind of mobile device.

Apparently I need to download an authenticator app for my tower PC.

I assume, as with all technology, this area is rife with bastardry and pitfalls.

Can anyone recommend an authenticator that isn't going to fuck me over, or terminally lock me out of my account on a whim?