Not currently but do offer a monthly question set for free inside the app. This changes every month with new questions for Step 1 and Step 2 pulled straight from the Q-bank questions.
This depends on how you signed up. Did you make an account on our website? If so, did you pick a subscription plan at that time? If yes, then log into your account and you can cancel there.
Alternatively, you would have subscribed from an In App Purchase inside the app (you either registered in the app, or chose 'free' on the website at registration). If this is the case, you will need to go into Settings > Apple ID > Subscriptions. From here you can cancel your subscription.
This depends on how you signed up. If you subscribed on our website then you can request a refund by email or the contact form. Refunds are not guaranteed and are evaluated on a case-by-case basis. Alternatively, if you subscribed via In App Purchase, you must contact Apple to request a refund.