A companion app meant for MSIL infotainment NATSA system(accessory). It connects to the accessory over Bluetooth or USB and does handshaking with accessory to identify it as MSIL NATSA infotainment system. It provides information to the phone user on the other apps that are accessible through the accessory’s UI or apps that can communicate with the accessory to control certain functionalities of the accessory. It also provides information to the accessory on apps that can be accessed from the accessory and their installation status.