If you don't have a portal, you can license your app at the standard level through a license code. More info here - https://developers.arcgis.com/ios/guide/license-your-app.htm#ESRI_SECTION2_8F2F5E45D3294F1880F75177B...Unfortunately, licensing an app based on a user logins is only available for on-premise ArcGIS portals, or ArcGIS Online Organization subscriptions.