There is no contract for monthly and annual subscriptions.
You may cancel your subscription at any time by going to the Administration > Account > Subscription page and clicking on the Cancel My Account button on the bottom left and following the prompts. If you are being billed automatically on a credit card, we will disable the recurring transaction.
As mentioned in our Terms of Service you must agree to, monthly subscriptions are not refundable and annual subscriptions are not refundable after 14 days.