eMusic is a music streaming service and a music store for digital music. 

The service offers a membership for users to subscribe to their favorite artists or genres and receive exclusive content or stream their entire collection for free. The service offers both a free and a premium subscription.

The free version is intended for people who simply want to enjoy a music streaming service. The free version has no limits on the number of tracks that can be downloaded or the amount of content that can be streamed.

The paid version has a monthly subscription that can be paid through the app itself. It allows users to download an unlimited number of tracks and streams and has no ads.