Yes, Castbox supports Android Auto. If Castbox doesn’t show in your phone’s Android Auto, please kindly follow the following steps.

1. Open Android Auto

2. Tap the “three lines” icon in your top left corner

3. Tap “About”

4. Tap “About Android Auto” continuously for 10 times (which will start the developer mode), then allow developer mode

5. Tap the three vertical dots on the top right (beside “About Android Auto” icon)

6. Tap “Developer settings” in the drop-down list

7. Scroll down to the bottom and tap “Unknown sources” to enable it with a √

8. Back to the main interface of Android Auto – click the circle icon on your bottom left to exit Android Auto.

Then restart Android Auto and see if Castbox appears in the app list.