Probably the best free Podcast app out there, compatible with Chromecast.

Castbox is an easy to use podcast player, offering a clean layout and easy to navigate interface. With a wide category of podcasts to choose from, you can stream or download your favorite podcasts anywhere, anytime for free.

Castbox offers continuous playback with customized playlists, one-button subscription options, and the ability to download episodes for offline listening. Listen to top Podcasts from Around the World and subscribe to over 1 million podcast channels including top networks like NPR, Gimlet, BBC, Earwolf, HowStuffWorks, PRX, This American Life and CBC or discover new and trending podcasts from 16 different categories.