I use Google Authenticator to provide 2 factor authentication (2FA) for almost all of my online accounts. However, Google doesn't offer the app in Watch version. A 3rd party developer created an app called 2STP that does have the watch version. https://itunes.apple.com/us/app/2stp-2-step-authenticator/id954311670?mt=8 But, is is safe to use 3rd party app in this way? Can the developer make copies of the barcode, account name, etc?