Yes — on Google Play
Costco has a Google Play listing.
App Store
On Google Play
Is Costco on Android?
About Costco
It's easy to save time and money while on the go, with the Costco Mobile App! We've improved our mobile app, to make it easier for members to access the incredible values found only at Costco. DIGITAL MEMBERSHIP CARD: Access your membership card from the home page of the app. Use your membership card to enter the war…
Costco is listed on both the App Store and Google Play from Costco Wholesale Corporation, so you can install it on Android phones and tablets. The Play Store listing shows 10,000,000+ installs.