I really do like the idea of having an app to notify me of when the print has completed certain events. However I find it lacking in functionality.
On Repetier-Server, you do not have the option to get updates every XX minutes.
In the app, we should be able to choose which server to ping and get real-time data on the print job.
Right now I see the Informer as a glorified text messenger that doesn't want to hear back from you.