Requirements for testing: Ngrok Mobile app Testing: Install a new site with this branch Give the site a public internet site address (URL) using Ngrok and https As admin, access to the site using the public URL Go to Site administration -> Messaging -> Notification settings and check that you see the "Mobile" plugin enabled (checkbox with a tick) just under Notifications plugins Now go to Administration -> Site registration And complete the registration process by accepting the "Privacy notice" and clicking "Register your site" button Once the registration process finishes, go back to the Site administration -> Messaging -> Notification settings > Mobile settings Go to the bottom of the page and check if the "Airnotifier Access key" field is empty If is empty click on "Request access key" to retrieve a key Now create a new normal user account in the site (no admin) Using the Moodle app, access to the site with the new account using the public site URL In the Moodle app, go to the "More" option (at the bottom, is the icon with three horizontal lines, right to the bell icon) -> Preferences -> Messages Enable the following settings: Accept messages from: Anyone on the site Notification preferences: Mobile Put the Moodle app in background in your device Now, as admin in the Moodle web site, send a private message to the app's user Confirm that: You receive Push notification in the mobile device with the new message