ADInterstitialAd is a wrapper around the ADInterstitialAd class found in the Apple iAd framework and is only available on iPad.

private ADInterstitialAd fullscreenAd = null;
void Start()
{
	fullscreenAd = new ADInterstitialAd();
	ADInterstitialAd.onInterstitialWasLoaded  += OnFullscreenLoaded;
}
void OnFullscreenLoaded()
{
	fullscreenAd.Show();
}