# Subscription Setup

- [Subscription Programs](/docs/support/subscription-setup/subscription-programs.md): A Subscription Program is the heart of the Smartrr app. Subscription Programs control which products are available for subscription purchase.
- [Selling Plans](/docs/support/subscription-setup/selling-plans.md): Selling plans define how customers can purchase products on a recurring or prepaid basis. They allow customers to subscribe, schedule repeat deliveries, or pay upfront for a specific period.
- [Subscription anchor dates](/docs/support/subscription-setup/subscription-anchor-dates.md): Anchor dates are an optional add-on to Subscription Programs that set a day on which billing interval calculations should be made + schedule specific product ship dates.
- [Maximum/minimum (finite) subscription plans](/docs/support/subscription-setup/maximum-minimum-finite-subscription-plans.md): This optional subscription plan setting allows brands to define a required maximum or minimum number of billing cycles for any subscription plan.
- [Email subscription notifications (Customer Notifications)](/docs/support/subscription-setup/email-subscription-notifications-customer-notifications.md): Keep your customers in the know about their upcoming subscription orders with customizable email notifications.
- [SMS subscription notifications (via Twilio)](/docs/support/subscription-setup/sms-subscription-notifications-via-twilio.md): With Smartrr, you have the option to engage your subscription customers via SMS with a Twilio account. SMS notifications can be used to let your customers know about their upcoming orders.
- [Subscription discount codes](/docs/support/subscription-setup/subscription-discount-codes.md): Discount codes created in Shopify work with Smartrr subscriptions, so there’s no duplicative work on your end.
- [Prepaid subscriptions](/docs/support/subscription-setup/prepaid-subscriptions.md): Prepaid subscriptions allow your customers to pay for their recurring subscription deliveries upfront.
- [Sequential Flow Builder?](/docs/support/subscription-setup/sequential-flow-builder.md): The Sequential Flow Builder is a powerful tool designed to enable merchants to create subscription lifecycles by enabling a sequence of products after a certain number of deliveries.
- [Shipping methods](/docs/support/subscription-setup/shipping-methods.md): Setting dedicated shipping methods in Smartrr is useful in the case you would like to fulfill your subscription orders differently than one-time purchase orders.
- [Subscriptions when an item is unavailable](/docs/support/subscription-setup/subscriptions-when-an-item-is-unavailable.md): Sometimes, products in your Shopify store are deleted, drafted or archived.
- [Buy-now-pay-later payment methods for subscriptions](/docs/support/subscription-setup/buy-now-pay-later-payment-methods-for-subscriptions.md): Per Shopify limitations, "Customers can't use accelerated checkouts or local payment methods such as Amazon Pay, Google Pay, Klarna, mollie iDEAL, and Sofort, to purchase subscriptions."
- [Checkout Extensions](/docs/support/subscription-setup/checkout-extensions.md): Checkout Extensions offer extra functionality in the Shopify checkout flow.