TomTom VIA 1605M Automobile Portable GPS Navigator At the Heart of the JourneyTomTom is the world's leading supplier of in-car location and navigation products and services focused on providing the world's best navigation experience. Our products include portable navigation devices, smartphone apps, GPS sports watches, in-dash infotainment systems, fleet management solutions, maps and real-time services, including the award winning TomTom HD Traffic.