Easy to use; UI bugs; no iPhone X support

I like Google Authenticator because the Google brand is trustworthy.

There are a few UI bugs, the one that bothers me the most is, after scanning some QR code, the entry gets added twice, and after I remove one of them, the navigation bar disappears.

It has not been updated for iPhone X yet, so there are large black areas below and above—quite ugly to look at :(

Jiehan Z. about Google Authenticator, v3.0.0