App visits to Costco's platform leapt 63 percent year over year in 2026 — the single most commercially significant behavioral metric in Costco's digital ecosystem, communicating that the member community has discovered something that the casual warehouse shopper has not yet acted on: the Costco app is not just a digital membership card. It is the most commercially useful tool available for maximizing the value of a Costco membership. Most Costco members use the app for two th