Use APKPure App
Get Notification Manager old version APK for Android
Überprüfen Sie, was alle Anwendungs sind Entsendung Benachrichtigungen auf Ihrem Gerät.
Notification Manager is the application that list the app that may post notification to your device. If you want to disable notification from any app then just click on "App Info" button and then un-check button "Show Notification" on that screen.