Your free Vibary membership can be cancelled at any time.  Since membership is free and does not expire, instead of canceling, you may want to keep the membership and have it ready to use whenever the need arises. 

When you request a cancellation of your membership, your username and password will be withdrawn. No one will be able to use that information to sign into the Vibary once you have cancelled. For your security, you must sign into the Vibary in order to cancel your Vibary membership.