Chirp audiobook purchases cannot be shared between different Chirp accounts.
The Chirp app for iOS does support Family Sharing — specifically, this means the Chirp app is added to your family’s shared library of apps once it’s been downloaded by a family member. This is why you’ll see “Family Sharing” listed for the Chirp app in the Apple App Store. However, this does not extend to any purchases in your Chirp library. Audiobooks can only be accessed by the account that originally purchased them.
You can read more about Apple Family Sharing here.
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