In this article I am going to show you how you can integrate Pushover with your Drupal site. I will illustrate a couple of examples of how you can use Pushover to notify yourself as soon as something happens on your site. The code I write in this article is also available in this repository so you can just clone that if you want to follow along.
He starts with an introduction to Pushover and what kinds of features it offers for the handling of push messages (with the app being not free, but "very affordable"). He help you get everything you need set up including a Pushover account and the Pushover class to use in a custom Drupal module. He includes the code you'll need to configure the module to use the library and a method to create the Pushover class instance. He then shows how to send messages for things like the addition of a new comment and user login via hooks, sending a message when an administrator logs in.