Originally Posted by timmyspeed80
i have Google maps downloaded is their any better sat nav's that are free
You'll need to qualify what you mean any time you ask a "which is best?" or "which is better question?". That said, check out the All Known GPS Apps in the GPS forum and try some out -- especially if you're only considering free ones anyway. You can read suggestions all day long and have no idea if a GPS app is suited to your needs or not.
Personally, I wouldn't consider Google Maps as a suitable in-car nav app. It's lacking voice prompts and can't even automatically progress to the next instruction.