When Heroes actor Greg Grunberg tells you to download an iPhone application, you can’t help but listen. Best known as television’s mind controlling savant Matt Parkman, Grunberg demoed location-based coupon startup Yowza at today’s Under the Radar Mobility Conference. Grunberg’s iPhone app offers users deals from nearby stores, restaurants and gyms. Now that Foursquare has begun advertising location-based deals it’ll be interesting to see if there will be overlap between the two companies. ReadWriteWeb caught up with Grunberg to find out what’s keeping him out of the actor’s studio.

Photo Credit: Albert L. Ortega