When available the "OAN Live" app is free and will allow you to access "OAN Live" by logging in with your "OAN Live" credentials.
On a handful of platforms, specifically Roku, AppleTV,, FireTV, and Google Play OAN offers a paid app the provides access to similar to "OAN Live" but the payment / subscription for this OAN app is managed through the specific platforms billing system and those apps are not compatible with "OAN Live".
If you wish to have an app based experience please install the "OAN Live" app from the supported platform of your choice. See the following article for a list of platforms that are currently supported for "OAN Live"