Costco members on social media have highlighted some things about the warehouse retailer that they believe could be improved.

Mobile shopping Through the Costco mobile app, members can shop, refill and check prescriptions, as well as find the nearest locations. Consumers can also shop the company’s expanded selection ...

The company has been working on both its website and app. In September, for instance, Costco executives said the company had improved the "native search function" for the U.S. version of its app.