Currently we also on going to develop Okta on Android and IOS for our Apps.
For IOS, we already explore some libraries and found out two libraries for sign in ( Okta Open ID Connect Library https://github.com/okta/okta-oidc-ios and Okta Swift Authentication SDK https://github.com/okta/okta-auth-swift#oktaauthstatus ). If we have only MFA authentication (with OTP from SMS) for verifying user when they are login. Which library should we choose?
From docs, we see that Okta Swift Authentication library doesn’t use Client ID