iHeart radio and Pandora are basically radio services. Spotify is different. It is the most popular streaming streaming service with the best recommendation feature. If you'd like to learn more about spotify vs pandora, you can take a look at the comparison page. If you'd like to download Spotify songs to local devices for listening, you can also use the spotify audio converter for mac. It is one of the fastest converter in the world. Hope these detailed tips can be of help to you.