aMusic was a native app for accessing Amazon’s Cloud Player service that launched in October 2011. Although Apple’s own iTunes Match can also store music on the Internet, Amazon’s service offers 5 GB of free storage, and can stream songs instead of downloading them.
Violation: Amazon asked Apple to pull the app, according to Mashable. The developer, James Clancey, had cited “legal issues with the music industry.”
Jailbreak Alternative: I’m not aware of any. However, the $2 gMusic can access Google’s similar service, and is available without jailbreaking.
(MORE: Google Music Store Launched with Free Track Sharing, Exclusive Content)