CarStream 2.0.6 is essentially a custom APK that disguises itself as a music or media streaming app within Android Auto. It is based on the earlier "AAStream" project and later maintained by independent developers. This version allows users to stream (and sometimes other web-based video content) directly to their car’s infotainment screen while parked (or technically while driving, though that is strongly discouraged and often illegal).
: Can be installed on non-rooted devices using specific sideloading methods like Customizable Interface