If you're looking for the best user experience in Apple CarPlay and Android Auto, you should get the Pioneer AVH-4100NEX head unit for your car. The device is my personal favorite and has a lot going for it in terms of features and the attractive price point.
You get both of the latest in-car softwares in the same device for a price that's almost $200 lower than the suggested retail price of $700. Here is the latest and lowest price from Amazon...
Lowest Price on Amazon: $529.94
You can also read my in-depth review of the head unit by clicking here.