In May, Amazon announced that it was ending its Prime Now speedy delivery as a standalone service and integrating it into the main Amazon website and app. There are now 29 of the stores and the cashierless technology is used at select Amazon Fresh full-size grocery stores and is coming to Seattle’s Climate Pledge Arena next month. The first Amazon Go opened on 7th Avenue in Seattle in January 2018. Shoppers can also use Amazon One, the company’s palm-reading biometric ID app at select locations. At Whole Foods, which Amazon owns, the QR code can be scanned for Prime savings and for payment at select stores. In the main Amazon app, the company has built an “in-store code” feature (listed in the horizontal menu on the app home page) that now works in any of Amazon’s brick-and-mortar stores: Go, Fresh, Books, 4-star and Pop-Up. Amazon Go’s systems automatically debit their accounts for the items they take, sending the receipt to the app. When they leave, they do so without visiting a checkout line.

Overhead cameras work with weight sensors in the shelves to precisely track which items those shoppers pick up and take with them.

Shoppers check into the stores by scanning a unique QR code on their smartphone. Amazon Go is advertised with 'Just Walk Out' technology, available for users with the Amazon Shopping app or, at some locations, Amazon One or a scannable credit card linked to an Amazon account. Amazon declined to comment on this figure ahead of the Go Grocery launch.“Just Walk Out” refers to the technology that makes Go actually go. According to Bloomberg reports ahead of the 2018 launch of Amazon Go, sources close to the company said Amazon planned on opening 3,000 Go stores by 2021. There's no word on whether this concept will come to other cities - Amazon's reps were tight-lipped about rollout plans during our brief store visit. But after walking out, the system had worked out that I'd taken just one tomato (not the three or four I picked up while I was checking for freshness) alongside a handful of other groceries. The produce is sold in packages or by the item (like avocados at $1.19 each) so there's no weighing to confuse the process. We took a look around the Seattle store ahead of the opening and, by and large, it feels like a suburban grocery store, with a mix of prepackaged goods and fresh items - all spread across 7,700 square feet.

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