Just found this out. Honda link is just the Appradio interface. At least on iPhone 5 and up anyways.
I found this by using apples own settings panel. If you go to settings/general/about and scroll down while your Appradio is connected to your iPhone 5 or above you will see a tab called display unit that you can touch. Pressing it will give you the option of seeing available apps. This usually updates faster than pioneers website so this is how I check for new apps.
Well today I was surprised to find honda link and it's two apps on the list....I downloaded the two free apps and yep. They work perfectly well on Appradio.
You can try it yourself. The apps work.