For me WAZE is a must have for any smartphone owner. Because it is free. ;-) No gimmicks, no Premium version, no ads. Free. It is also traffic information, And also free, can arguably be the best available for you, depending on where you live and what options you have. Traffic information is free because it is crowdsourced from its users, so the more you use it, the more locals benefit. So the more users, the better its local information about traffic conditions become. In non-dveloped countries, where traffic information is scarse or non-existant, Waze is the only option. Last because it has incorporated social features, so you discover when friends are close by, or even crossing your route. Cool! :-)