Application to manage magazine subscribers?

Application to manage magazine subscribers?

Hello,
I am in need of a Creator application to manage subscribers to a magazine.  The magazine has 1 and 2 year subscription options for both USA and International, so 4 possible subscription types.  I would like the app to keep track of when a subscription expires and possibly email the subscriber when their subscription is near the expiration date.

Is there a sample app out there that I could get a start with?  I have searched but haven't had much luck.  I could build this from scratch, but would rather not have to.

Thanks