Shopify’s Mobile Buy SDK makes it simple to sell physical products inside your mobile app. With a few lines of code, you can connect your app with the Shopify platform and let your users buy your products using Apple Pay or their credit card.

Mobile Express Checkout — For existing Express Checkout integrations, or additional features, we recommend Mobile Express Checkout. 2.Parallel or Chained Payments — To incorporate features such as third-party, parallel, and chained payments into your mobile apps see the Mobile Payment Library (MPL) on GitHub and MPL documentation. Issues related to MPL should be filed in the following repository: sdk-packages