All you need is an Amazon account, the free Amazon Shopping app, and a recent-generation iPhone or Android phone. You can find the Amazon Shopping app in the Apple App Store, Google Play, and Amazon Appstore.
When you arrive, open the app, tap “In-Store Code,” and scan in with the QR code presented. Then feel free to put your phone away—you don’t need it to shop. Just browse and shop like you would at any other store. Once you’re done shopping, you’re on your way. No lines, no checkout.
At select Amazon Go store locations, you can also enter the store by using a credit card linked to your Amazon account or by using Amazon One. Amazon One is a fast, convenient, contactless way for people to use their palm to enter and pay for items purchased at Amazon Go. You can learn more about Amazon One here