Doesnt back up your keys
Just discovered that any keys that youve added to this app after September 2013 are NOT backed up AT ALL — even a local encrypted iTunes backup excludes them. This means youre out of luck if you want to migrate to a new iPhone or need to restore from backup for any reason. Google also offers no means for moving all your keys to a new device.
Google has clearly stopped caring about this app. Dont bother with it, use Authy instead.
Westacular about
Google Authenticator, v3.0.0