Can non-consumable in-app purchases that include content hosted on Apple's servers be free?
I couldn't find anything about this in the docs and as you can set in-app purchases to be free in iTunes connect, I assumed it was possible.
I have set up a non-consumable in-app purchase on iTunes connect, uploaded some content and set its price to be free.
Unfortunately when I request the products data using the product ID, I receive that ID in the SKProductsResponse.invalidProductIdentifiers array.
I have also set up another in-app purchase different from the previous one only in the price, as its price tier is Tier 1 rather than Free. This one works just fine.
Thanks for taking the time to read.
From the documentation, In order for a download object to be queued, it must be associated with a transaction that has been successfully purchased, but not yet finished.
For free data hosting why you dont want to use your own server?
来源：https://stackoverflow.com/questions/17133222/free-non-consumable-in-app-purchase-with-hosted-content-on-appless-servers