iHeartRadio is a radio service that lets you listen to free, unlimited music, thousands of radio stations, curated playlists and podcasts. Pandora is an app that allows you to listen to a wide range of music and podcasts. It works with your smartphone or tablet. It allows you to create personalized stations and mix them with other users who have the same interests. You can also subscribe to the service if you want to get it on a monthly basis.