Google Maps. I HATE that Apple will not let me switch to Google Maps for all of my navigation needs. Apple Maps has given me erroneous directions too many times, while Google Maps has never, once, given me bad directions. Apple Maps has also failed on a number of occasions to steer me around traffic issues, while Google Maps reliably tells me about alternative routes when traffic is a problem. Neither of them give me directions in my HUD. Only Audi's proprietary navigation system will do that, and even though it sits on top of Google Maps, it is slow as molasses and often times just glitches, so I use Google Maps on CarPlay and forego the HUD directions.