I use my iPad for car navigation. In the past I have used a paid app called Navigon. It has worked rather well, but it's been two years since I last used it, and recent reviews of the app suggest that it is not very reliable since recent updates. Surprisingly, it seems that the three most popular navigation apps are FREE. They include: Google Maps, Apple Maps and Waze. Out of the three I would expect Google to be the most reliable, but WAZE really intrigues me for its social networking merits where users are giving real-time updates while on the road. But are the free apps just as reliable as the paid ones? I am wondering what app(s) you find are the most reliable for best routing algorithms and reliable turn-by-turn voice navigation?