Payment will be charged to your Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period.Your account will be charged for renewal within 24 hours prior to the end of the current period. Subscriptions may be managed by the user & auto-renewal may be turned off by going to the users’s Account settings after purchase. Any unused portion of a free trial will be forfeited when you purchase a subscription during the free trial period. Your free trail subscription will automatically renew to a paid subscription unless auto-renew is turned off at least 24 hours before the end of the free trial period. You cancel a free trial or subscription any time by turning off auto-renewal through your iTunes account settings. This must be done 24 hours before the end of a free trial or subscription period to avoid being charged. The cancellation will take effect the day after the last day of the current subscription period, and you will no longer be able to use the apps paid functionality.
How to see or cancel subscriptions on your iPhone, iPad, or iPod touch
Open the Settings app.
Tap your name.
Tap Subscriptions. (If you don't see "Subscriptions," tap "iTunes & App Store" instead. Then tap your Apple ID, tap View Apple ID, sign in, scroll down to Subscriptions, and tap Subscriptions.)
Tap the subscription that you want to manage.
Tap Cancel Subscription. If you don’t see Cancel Subscription, the subscription is already canceled and won't renew.