Hiding notifications

I am looking for an app that will allow me to easily enable and disable the hiding of notifications from specific apps. When I am with certain people, sometimes I show them things on my phone, and a sensitive message will pop up from WhatsApp or Viber. I would love to be able to just have an app that I hit a button, and it just doesn't show notifications for a list of apps that I select, until I hit that button again.

There are lots of app blockers that hide notifications, but they also...

Hiding notifications

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