How do I add the podcast feeds to the Apple Podcast App?

Find the show on Big Sandwich you want to add to the Podcast App.
Copy the feed URL which will look something like https://bigsandwich.co/feed/wplanet/
Open the Apple Podcast App.
From the bottom menu select Library.
From the top right select Edit.
Select Add Show by URL…
Press and Hold and paste the URL.
Select Subscribe.
Enter your Big Sandwich username and password.