Since early May (2013) our Webgrrls Events app is available in playstore. Originally, it was designed so that the user himself get the events after pressing refresh button. By this action we wanted to prevent using the webservices when there is no internet.
The user had to update the events time to time, and it was not a nice thing to do. To save the user from doing the above task, we came up with the idea of the GCM [Google Cloud Mwssaging]. The GCM service ensbles you to send messages to each registered device via push messages. In our case such a message would be setting a new event or change an existing one.