The Viago is a smartphone-based map and navigation app created by Garmin, a company that specializes in producing GPS-related products. What separates the Viago from services like Google Maps is the fact that it can be customized via optional in-app purchases.
The Viago app offers a variety of features such as turn-by-turn navigation and multi-stop route planning. Its interface is capable of displaying current speed as well as the speed limit, and even has a special 'lane assist' feature that alerts you when it's time to think about switching lanes before an upcoming turn.
The Viago even permits users to access a three-day weather forecast for their destination. The app is compatible with iOS as well as Android devices.
One of the highlights of Viago's optional premium add-ons is Garmin Real Directions, a service that offers highly intuitive voice-guided navigation using landmarks, stop signs and traffic lights as markers, rather than street names.