All of our products are offered as a one time purchase. Most are also offered as a monthly subscription. On the product page you will have the option of either a one time purchase of the product or a monthly subscription at a discounted rate. Your monthly subscription will automatically re-bill and re-ship every 30 days from the date of your first purchase of that product. You can subscribe individually to any number of products. You can manage your subscription(s) from your my account page. You can cancel any subscription after 3 months with no obligation. You also have the option to put a subscription on hold.