How can I get the Car Home app to work? I'm running KitKat and can't locate the Car Home app on it. It's listed in the Play Store as "Installed" and also "incompatible with all your devices", also "not eligible".  

There's a seeming incongruency in the app install versus availability, and an inability to access the the app on my devices: no icon, no ability to add a shortcut to the launcher?  

I've not seen another app in the Play store reporting itself in this odd manner.  My immediate assumption is it has been discontinued and/or is installed in the Android OS but only makes itself available under certain conditions (e.g. a docking station is present). 

There does seem to be discussion around the Internet about the Car Home app and docking station integration. 

Back in Gingerbread days I used to open the Car Home app manually to use it.  I haven't checked for it in a while. 

Currently I'm running a Nexus4 with KitKat but I think this doesn't seem to matter. The app also won't work with my Note 10.1 and is not available for the old Nexus S either (lost that phone though so I'm only going by what the Play store is reporting for it). 

I've settled for using a third-party app for now, however if Car Home is part of Android and the Play store I would prefer to use it.
I use Car Mode Ultra. It's highly customizable and more useful than the old car mode from Google