While we'd hate to see you go, you can cancel your Yapp subscription anytime. Your account will be active until the end of your subscription period at which time your account will be defunct and your apps will be archived.
To cancel your paid subscription, go to Billing and turn off auto-renew.
We are unable to give you a refund for the full or partial amount of your subscription. But, if you've already paid for a year, you will have access to the service through the end of that purchased period.
To avoid being charged for an additional year, you must cancel your paid subscription at least one day before the end of your annual subscription period by going to http://yapp.us/account/plans and turning off auto-renew.