Sound Calendar is a release date notifier and new music discovery app. It sends you notifications when artists on your iPod Touch or iPhone release new music but can also notify you of new music by related artists (including solo artists, side projects and collaborations).
On the release date of any iTunes release Sound Calendar will send you a notification and you can preview and purchase upcoming or released music.
Your artists are managed automatically (or you can change manually) and related artists can optionally be tracked so you never miss releases by your favourite band or its members. All information is updated automatically without you having to open the application. All you have to do is run the app when you add music to your device.