If you have an Apple device (iPhone/iPad/iTouch), you will be able to download the Freegal App by doing a search for “Freegal Music” in the App Store.
If you have an Android phone or tablet, you will be able to search for “Freegal Music” in the Google Play store. As a precaution, while many Android devices successfully run the Freegal Music app, not all Android devices are compatible.
Barnes & Noble tablet devices are not compatible with the Freegal Music app. For information on how to install the app on a Kindle Fire, please see the question “Is there an app for the Kindle Fire?”