For that problematic moment when you are angry at each other.
Every member of the family has the app installed on their smartphone. When one of you feels that “that” moment has arrived, and there is no point (or they just don’t want) in continuing the argument, they press the button. Everybody’s phone beeps and from now on its “waiting and letting go” time. This continues until all have pressed the “I’m ok now” button (or an agreed upon time has been reached – the length of which was decided when you all installed the app). When all have pressed the button, only then all will get the “all clear” alert.