it would nice to get support for the S4. I know, stock firmware should support rsap out of the box, but it doesn't work for me. My Skoda with Columbus (2008) disconnects the phone after a few seconds.
For various reasons i decided to switch to Cyanogenmod and i was surprised that i can't install this app. On my Galaxy S i used this for a long time and i loved it

So please add support for the S4!
Thank you,
Flo