If your phone doesn't have a great navigation app, or you don't have a big data plan, you'll need a dependable GPS system in your car. Right now you can get this Garmin 6" navigation system for 44% off regular price with free shipping from BuyDig on eBay. This device comes with free lifetime maps, and the device works both horizontally and vertically if space is an issue on your dashboard or windshield. The same GPS sells for $104.95 on Amazon, plus it's a refurbished unit, as opposed to this new one.