Google maps is a must have application on every smartphones. It eliminates the traditional way of asking the roads to different places. Google map shows the whole world. Each and every roads and about the transportation facilities in every small village to metro cities in every country in all of the world.
Google maps also provide a facility to download offline maps, so you can still find the way if you are stuck in a place without network coverage and nobody to ask. It has an admirable navigation system and it connects to atleast 4 or satellites thus providing the exact location. If satellites are not available the navigation is made possible through the location of cell phone towers. It also shows the bus and train timings of some cities.