This page only applies to Android 4.1 and above.
Android version 4.1 introduced a new feature, hiding notifications for a specific app.
This can also be used to suppress the ongoing application Appsi is using. It is not possible to run Appsi without the ongoing notification because the system may kill Appsi at any time if it is not shown. This would greatly distort the user experience.
Instructions specific to Appsi will be added here soon, for now please refer to this article on cnet to learn how to disable notifications for any app.