2025-06-28 00:00:00 Michigan's Thumb Coast life just got better with DoMIThumbCoast, the location-based app that connects you with amazing promotions offered by local shops and restaurants in cities and shopping districts around the beautiful Blue Water area. From the small-town charm of the Lake Huron coastal communities to historical waterfront sites, the DoMIThumbCoast app offers savings on dining, shopping, and entertainment.