There’s a line of thought which suggests that Apple’s CarPlay technology essentially turns your car into one giant iPhone add-on. A new trademark application, however, suggests that Apple is planning to lend its approval to some other, likely smaller third-party CarPlay accessories — coming soon to a vehicle near you.
Similar to the “Works With iPhone” developer program for accessories designed to connect specifically with the iPhone, Apple’s “Works with CarPlay” trademark will certify that a particular third-party product has been approved as meeting Apple’s performance standards for its in-car iOS interface.

