So it turns out that you don’t need a wallet to buy groceries, at least not in San Francisco. Last week, I started using an app called Instacart to order groceries and have them delivered to my door. The visually focused app allows you to select grocery items in categories ranging from baby care to booze, either by browsing popular products or searching for specific items by name.

About three hours after I placed my first order — which included things like frozen pizza, deli meat, milk, shampoo, and cat food — a friendly delivery driver named John brought my grocery bags straight to my door. The Bay Area-only service isn’t exactly cheap. Prices for individual products are generally at the high end, and there’s a $4 delivery charge. But it’s definitely convenient, and, more importantly, it didn’t necessitate my pulling out a credit card or cash to complete a transaction.