How to block all apps notification except sms and calls? By accident I made a reset to all apps notifications, and suddenly I have a machine gun of notifications popping up on the phone. Please, I know it's a smartphone, but it's still a phone and I merely want to be notified with phone issues: sms and calls. 

How can I block all apps notification, from sounds and in status bar, except sms and calls, without going individually to each of one?
It is possible with  Macrodroid automation app (free upto 5 macros) and real easy to learn

Trigger: Notification &rarr; Notification Received  &rarr; Select app  &rarr; Text content  &rarr; Any  &rarr; ok

Action: Clear Notifications  &rarr; choose apps from drop down (don't use clear all, since it has phone and SMS )&rarr; ok Text content  &rarr; Any  &rarr; ok

Constraints: Leave blank

Name the macro , save and you are safe from machine gun fire :)