title: Do I need Apple MFi certification to write an app that communicates with a Made for iPod car radio over USB?
body: <p>My car radio is Made for iPod and displays track info, can skip forward and backward, pause, play etc. </p>
  
  <p>iTunes Match content does not appear when the radio takes control. Can I build an app that can transmit this info to the radio without being certified with MFi? I'm not sure of the correlation between ExternalAccessory.framework and the MFi program requirements.</p>
  
  <p>For what it's worth, Pandora's iOS app sends track information over USB to my car radio, but other iOS music apps do not.  I am trying to figure out if it's a developer shortcoming or if Pandora is MFi certified.  </p>
  
  <p>Any ideas?</p>