How can I subscribe to a podcast that is available on Apple Podcast (, Soundcloud, or Google Podcast?

The easiest way to find and subscribe to a podcast is to use the app search engine. But if for some reasons you don't find the podcast, you can paste its Apple Podcasts URL or its RSS feed url into the app to subscribe.
You can also use a service like to find a podcast RSS feed from different services such as Apple Podcasts, Soundcloud, Google Podcast or even a blog.