To sign out of nVoq Voice for iOS:
Tap the nVoq Voice icon on the home screen.
Tap the menu icon.
Tap SIGN OUT.
If you signed in using Okta SSO a notification will appear that says, "nVoq Voice" wants to use "okta.com" to sign in.
(Note: It is a known issue with the Okta library that this message says "Sign In" rather than "Sign Out".) Tap Continue to log out of nVoq Voice.
Once you are signed out you are taken back to the sign-in screen.