If you visit the Authenticator app on https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en https://play.google.com/store/a

If you visit the Authenticator app on https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en https://play.google.com/store/apps/details?id=com.google.and... - you'll see at the bottom that it was last updated on September 27, 2017 As in, that's the last time an updated was published on the Play store. I'm sorry I didn't make that clearer.