https://www.theverge.com/2018/9/28/17913786/google-maps-waze-apple-carplay-iphone-ios-12-review

Apple’s iOS 12 update didn’t bring many changes to the in-car CarPlay system that’s been around for a few years. But there is one notable improvement: it now supports third-party navigation apps. Yes, that’s right. That means you can now use Google Maps, Waze, or some other navigation app in CarPlay instead of Apple’s default Maps app.

Both Google Maps and Waze have released updates to their iOS apps that added support for CarPlay already, and I’ve been testing them for the past week or so. Unfortunately, due to CarPlay’s inherent limitations and a number of bugs and performance issues, neither Google Maps or Waze are particularly compelling compared to their Android Auto counterparts or even Apple’s own Maps app.