title: Flutter request to server and show notification when app is closed
body: <p>I have a flutter mobile app and I want to request to server <code>every minute</code> and if any new data is available for user, show a <code>notification</code> <em><strong>WHEN THE APP IS CLOSED</strong></em>.</p>
  <p>can i do that without FCM(Firebase Cloud Messaging) and APNS(Apple Push Notification Service)?</p>