Currently there are three subscriptions, 1-year, 6 months, and 3 months. It is our philosophy that the question-based learning is more helpful over a longer period of time, not used as a traditional question bank just before an exam. Note, that the 1-year membership is originally an annually renewing membership, and you will be billed automatically each year on your anniversary date until cancelled. You may also cancel at any time without any penalty and request a refund if the charge was within our refund policy period.