-Payment will be charged to your iTunes account at confirmation of purchase and any unused portion of a free trial period, if offered, will be forfeited when a subscription to that publication is purchased.
-You may turn off the auto-renewal of subscriptions through your Account Settings, however you are not able to cancel the current subscription during its active period.
You may cancel a subscription during its free trial period via the subscription settings on your iTunes account.
-If a subscription offers a free trial, at the end of the trial period, you will be charged the full price of the subscription.
You will be charged for renewal within 24 hours of the end of the current period, for the same duration and at the current subscription rate for the product.