The policy: no refunds
Paid subscriptions (Pro and Max) are non-refundable. When you subscribe you’re charged for the billing period you chose (monthly or annual), and that payment isn’t returned once the period has begun — including any unused time if you cancel partway through.
You can cancel anytime from your account settings or the billing portal. Cancelling stops the next renewal; you keep your paid features until the end of the period you’ve already paid for, then drop back to Free. Your practice history stays put either way.