Google first launched the Google Maps application in 2005, but it has come a long way since then. The application is now available for all of the major mobile platforms and it offers the most complete set of maps you can get for free. From basic street maps the app has grown to encompass 3D views, voice guided turn-by-turn directions, live traffic information, street view photographs, and even indoor maps for selected buildings.
If you're in a foreign city you can use Google Maps to get directions and it will guide you there. You can even get tailored directions for traveling by car, bicycle, public transport, or on foot. This app is clear, concise, and easy to use. Best of all, Google Maps is completely free and it continues to be updated all the time so accuracy is constantly improving.
You can adopt Google Maps as a replacement or alternative to an in-car Sat Nav system. It also proves really useful for guiding you to points of interest and attractions on foot when you are in an unfamiliar city. The directions are spoken aloud, the streets are clearly represented onscreen and you can use the street view photographs to double check that you are in the right place. It really is the best navigation app you can get and it should be a permanent fixture on every smartphone.