It annoys my wife. She can't use the earbuds that came with her phone to listen to anything on her iPad, b/c it only came with a dongle going the other direction (for connecting standard headphones to the iPhone). When we're in the car she can't charge & use the aux cable at the same time. Both of these could possibly be solved with 3rd party dongles, but it's silly to have to pay $20-30 extra for that.
I prefer solving the charge+car audio issue with a Bluetooth receiver which can be found for $25 on Amazon, my wife loves being able to play music in the car without snaking an AUX cable from the dash to the center console.
I know that the headphones which came in the box work through the lightning port on my iPad. I think firmware support was added to all devices in iOS 10, maybe check if she's updated.
