RK3066 HeadUnit is a specialized service app designed for Android devices operating on the RK3066 chipset. This utility enhances the functionality of car head units with features tailored for an optimized driving experience. Key functionalities include Bluetooth calling support from various Android applications, media button remapping, and direct control of media players, including the ability to auto-start music applications upon booting or when the head unit is activated.

Additionally, it allows users to adjust volume based on vehicle speed, manage background volume changes without interfering with the system UI, and set safe volume levels during start-up. The app supports both older and newer versions of head units, and a Call History widget is included for convenience. The application is open-source, promoting transparency and community collaboration, and is compatible with a wide range of brands using the RK3066 chipset.