Apps can now offer annual subscriptions through the Billing API
To support more business models on the Shopify App Store, we’re introducing annual subscriptions through the Billing API. Merchants can choose a yearly subscription for your app, and you can track annual revenue from the Partner Dashboard.
We’ve also made it simple for merchants to upgrade an existing app subscription from a monthly to a yearly plan. Price differences will be prorated when merchants change plan intervals.
Learn more about enabling annual subscriptions for apps on Shopify Developers.