Note: instructions for setting up and connecting to the Ebsco App can be found here:
The Naxos Music Library iPhone app was designed with institutional users in mind, so a subscription through a university or library such as MSU's Harry A. Sprague works. It just works little differently on an iPhone than on a computer.
For more information and a neat video that shows how to use this app visit:
http://naxosmusiclibrary.blogspot.com/2010/09/calling-all-app-users.html