Pocket Casts has one of the most colorful, pleasant to use interfaces. For example, the app takes the most prominent color from the album art and colorizes the rest of the playback interface based on that color. This allows the interface to stay vibrant and slightly different for each podcast. Or
$4 purchase with no free option + $9 for web makes for a somewhat pricey app in comparison to other popular podcast players, especially when considering the web option is extra even when the mobile app is purchased.