com.mufri.authenticatorplus is the app I'm using, however it's not free, which is why I'm hesitant to freely recommend it. eu.overmorrow.thenticate also offers

com.mufri.authenticatorplus is the app I'm using, however it's not free, which is why I'm hesitant to freely recommend it. eu.overmorrow.thenticate also offers this by description and a friend is using it for this, however I have no personal experience with that app.