Using appStoreReceiptURL to restore non-renewing subscription

I can use the receipt obtained by appStoreReceiptURL to retrieve the purchase date of non-renewing subscription. For non-renewing subscription, from the purchase date I could calculate the expiration date.

But when I try to restore using appStoreReceiptURL. I found that it returns nil on devices that did not make purchase even signing in with the same Apple ID.

Using

[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];

cannot update the receipts in appStoreReceiptURL. Did I do anything wrong here? Or is it just not possible to restore the receipts this way?

Thanks

You cannot restore the transactions in the way you are trying as they are consumables, and consumables have a finite life.

However, you could parse the receipt, and calculate the subscription period from this.

The receipt will be in the main bundle, but can be refreshed by using

recreq = [[SKReceiptRefreshRequest alloc] init];
        [recreq setDelegate:self];
        [recreq start];