The app works. However as an application it's a little... threadbare. Once you start adding multiple accounts there is no way to sort them. It just puts them in a list. You can sort them manually. But that is cumbersome. Another issue is that the timer on the right side is covered up for the very bottom entry. So the only way you know when the timer ends and the numbers change is to manually drag it up a line or two. Solution = Setup a dummy account and make sure it is last.

App suddenly desynced from the correct time, and the directions in the Help do not match the reality of what is actually in the app, as if they are outdated for a previous version. As a result, my codes only work for the first few seconds and then stop working. I then have to wait several more seconds for a new one to generate. There is no apparent support to contact about this error.

Well, I hate to not be able to root for this app anymore after these years of usage. But while trying to transfer my codes to another phone, instead of succeeding at moving them the app simply deleted the codes on EVERY device. With no warning. (Or, if there is a warning, it is so easily accidentally missed that it was no better than nothing because I don't remember seeing any warning.) I've already contacted Google Support. They say there is nothing that can be done to restore it.