Find Your App Version in Salesforce Authenticator

Expert trailblazers always use up-to-date maps while trekking in the wilderness. Salesforce Authenticator has added the app version so you always know where you are. In the app, tap Salesforce Authenticator settings icon and look at the bottom of the page. If you don’t have the latest version of the app, hike over to the App Store or Google Play and download the latest version for free.

App version at bottom of Settings pane.