My store, Meijer, has a scan-n-go option on their app. I use my phone to scan items in the aisles, put them straight into my bags, and when I check out, my phone links to the register with a qr code to bring up my items and let me pay. Generally, the cashier has to come over to scan 5-7 random items to make sure I'm honest, then I tap my card and I'm on my way. I don't have to unload and reload my carriage at check-out. I drive farther to get to this store and it's the only reason I shop there instead of the newer, bigger, better Kroger closer to my home.