Postmates, the on-demand delivery app, has introduced the Postmates Delivery app in the Shopify App Store, which has been in beta for most of Q3. Merchants who enable the Postmates Delivery app will be able to offer their customers a new delivery option — a 2-hour delivery window.

Postmates for Shopify allows merchants to view the orders they need to fulfill through the Postmates Delivery app from directly within Shopify. In addition, merchants will also receive an email notification whenever their customers place an order and choose the 2-hour delivery option. For the initial launch, merchants have the ability to manually create deliveries. They are able to do this from the Postmates App Dashboard or directly from Shopify’s Orders page.

With the new Postmates app for Shopify, retailers can add on-demand delivery to any transaction with just a touch of a button — no technical experience is required. By adding a same-day delivery offering, businesses can drive more revenue and increase order volume.

Recently, Postmates announced a similar offering to Square Sellers, giving on-demand delivery capabilities to Square’s small business sellers. Postmates introduced its delivery API, now called Delivery as a Service, in 2014 which allows businesses of all sizes to directly integrate and leverage Postmates delivery platform from their own app or website. Postmates partners with some of the world’s largest brands including Walmart and 7-11 through its Delivery as a Service product, enabling and fulfilling delivery through these retailers’ owned websites and apps.