"Easy Reorder" is available on desktops and in the retailer's mobile app, and builds a list of items purchased often, in order of frequency. The spin is, Wal-Mart once again makes use of its physical stores to compete with Amazon, blending its digital and in-store experience for shoppers.

"Here’s the cool part: We’re integrating both in-store and online purchases to provide you with a single spot to view (and repurchase) the items that you buy most frequently — items like dog food, cereal, shampoo and diapers," said Jordan Sweetnam, vice president of customer experience and product for Wal-Mart Global eCommerce.

According to Sweetnam, "Easy Reorder" contributed to the growth Wal-Mart saw in its first quarter.

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