Walmart Scan & Go
Walmart's in-store self checkout app
Walmart Scan & Go is an iOS and Android app that allows shoppers at Walmart to scan every item’s barcode, tally up the total and checkout with various payment options such as credit and debit card.
Amazon Dash Button
Place it. Press it. Get it.
Amazon Dash Button is a wireless device connected to your Amazon Prime account with the help of which you can place orders for your convenience. It is a specified button for you usual orders. Just press it and you have it ordered, especially if you don't want to think 24/7 for that and you just remember at the moment you need it.