iPhone Contact Filtering Solution

I need a straightforward way to silence every caller and texter on my iPhone except one specific contact whenever I’m in a meeting. Calls and texts from that chosen person (my wife) must still ring through; everyone else should be muted until I turn the filter off... (Budget: $30 - $250 USD, Jobs: App Development, Automation, iOS Development, iPad, iPhone, Mobile App Development, Mobile Development, Objective C)