Subscriptions will automatically renew and you will be charged unless auto-renew is turned off or unless you cancel at least 24 hours prior to the end of the current subscription or trial period.
Any unused portion of a free trial period (if available) will be forfeited when you purchase a premium subscription during the free trial period.
You can cancel a subscription or a free trial anytime by turning off auto-renewal using your iTunes account settings.
Follow the updates and you will find new types of cards, new fresh content, and much more.
Invito Cards May Offer Auto-Renewable Subscriptions.