A free program for Android, by Orion apps.
You can use the Zero Dot to get notifications when you receive a new message from a certain Facebook account. You don't need to take your phone out of your pocket to check for new messages, you can do that from your phone. If the account is not yet in your friend list, you can add it by completing a survey.
There is a data connection requirement, but it is not necessary for the app to function properly.
If you want to receive notifications every time you get a new message, you can use the pro version of the app.
The app will stop working after 30 minutes of inactivity.
