 <p>Check out <a href="http://superfeedr.com/" rel="nofollow">Superfeedr</a> (which I created!) for the RSS polling aspects. We will send your server a notification (including the update!) every time a feed has a new entry. Then, you'll have to fanout that update to all of your app users using <a href="https://developer.android.com/google/gcm/index.html" rel="nofollow">Google Cloud Messaging</a>. </p>