Yes. Since the iOS 11.1 software update, your iPhone includes a section within your settings so you can connect your phone to view TV content from different networks.
Simply go to your settings and select “TV Provider” and select “Ritter Communications”. It will direct you to a log in landing page. Here you can type in your TV Everywhere log in credentials. If you have not made an account yet, you can select “Forgot Password” and it will direct you to watchtveverywhere.com where you can select Ritter Communications and “Register”. After setting up your log in credentials you can sign onto the platform in your phone settings. After this is complete it will allow you to download multiple network apps like WatchESPN, Disney, etc. Keep in mind the more apps you download the more memory it will take up on your smartphone.