Ronin's paid plans are offered with a 30 day trial. The trial does not require a credit card and we will not bill you at the end of the trial period.
If you choose to discontinue use of Ronin, you can simply let your account lapse after 30 days. If you choose to continue with us you'll need to provide a valid credit card number to enable your subscription, you can change your account plan within the "Account" screen.
Ronin plans don't require a contract and you may cancel at any time from within your account.