It won't necessarily connect with Apple devices but it will play podcasts and audible for sure. For podcasts you can enable the AnyPod skill and then just tell it to play whatever podcast you want to hear. If you have an audible subscription, you can just say "Alexa, read *book name*, and even the specific chapters.
I seldom "drop in" on my kids because there are things I don't want to see or hear

. But we do send voice messages back and forth sometimes. If I'm in the kitchen and think of something I want to tell one of them, I can just say "Alexa, send a message to Aaron" and then tell her whatever I want to say. It's like a hands-free voicemail.