Re: Automatic conversion of kids free trial to yearly subscription
Commiserations.
Anything "free" generally comes with small print ... terms and conditions that need to be accepted before access. Free software trials from Apple, and from other vendors, developers, and companies, are no exception.
Am not very familiar with DuoLingo itself ... if it is not one of Apple's own products, the payment would likely reach the developer or vendor of the product, rather than remain in Apple's coffers.
Refunds that Apple grants approval for are generally for items from within Apple's own ecosystem. Seems Apple acts rather like a bank does in facilitating some payments. Your son's subscription would be an active one he can use, if it hasn't been cancelled. Your son would likely have a detailed receipt.
The way I understand it:
All Free trials are for people to try out while considering a purchase or a subscription ... if not cancelled at least 24 hours before the free trial expires, the purchase or subscription comes into effect automatically at the end of the trial period. Developers need to earn, eat, and pay bills too, just as we all do.
Seems many of us find that out to our cost, by trial and error, rather than by carefully reading the small print before we accept it, or from heeding buyer-beware / "no free lunch" common-sense that is often, sadly, learned by hard experience.
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Legal: Here's what I found:
Apple Media Services Terms and Conditions
https://www.apple.com/legal/internet-services/itunes/us/terms.html
Eg: says:
"Certain Subscriptions may offer a free trial prior to charging your payment method. If you decide to unsubscribe from a Subscription before we start charging your payment method, cancel the Subscription at least twenty-four (24) hours before the free trial ends."