Android Auto and Android Automotive sound like two names for the same product, which isn’t exactly helping anyone. Thankfully, the difference is pretty simple.

The one that most drivers will be familiar with is Android Auto. The experience is powered by your Android phone, and a compatible car display provides you with a driving-friendly interface for navigation, music, messaging and supported applications. It’s Google’s response to Apple CarPlay and can be used via USB or wirelessly, depending on your phone and car.

Android Automotive OS (AAOS) is a different animal. It operates directly on the car’s hardware, meaning there’s no need for a phone to do the heavy lifting. It gets a little more complicated when Google built-in comes into the mix (as if the naming wasn’t confusing enough), but that’s another story.

Consider your phone the brain and the dashboard the larger, less distracting place to put everything while driving.

Android Auto is not a substitute for the software that is already in your car. It displays a specialized interface from your phone on the car’s screen, allowing you to use compatible apps like Google Maps, Spotify and messaging services without having to handle the phone.

That phone dependency is part of the attraction too. You can connect to another compatible vehicle and bring your apps, accounts and preferences with you. The car itself may be running Android, another operating system or something completely proprietary.

The concept behind Apple CarPlay is similar. Even CarPlay Ultra, which extends further into compatible vehicles by taking over more displays and surfacing some vehicle controls, still requires an iPhone.

Android Auto apps can also access some vehicle data if supported by the car manufacturer, such as battery level or estimated range.

Android Automotive OS is more than that, as it is the software platform that is installed in the vehicle itself and allows automakers to integrate it with infotainment, instrument displays, climate controls, EV information and other vehicle functions rather than just providing an interface from a connected phone.

So, is Google built-in the same as Android Automotive?

AAOS is open source, while Google built-in relies on a separately licensed collection of Google Automotive Services. That can provide a car with native Google Maps, Google Play and Google’s voice assistant, without the driver’s phone. Google treats those services as a separate, optional package rather than part of AAOS itself.

That difference is important when you’re reading a spec sheet. For instance, Rivian builds its own software experience on top of AAOS and doesn’t offer Android Auto or CarPlay projection.

Polestar demonstrates how flexible things can be. It can have Google built-in in its AAOS-based cars and still be compatible with Android Auto and Apple CarPlay, so it’s not a case of either/or. In 2020, the Polestar 2 was the first production car to feature Android Automotive OS.