The PayRange system includes Blukey™ hardware, a mobile app and service and is poised to be the world’s simplest payment solution for machines. The PayRange system enables existing vending machines, parking meters, coin-op laundry equipment and transit-ticket kiosks to accept mobile payments simply and economically. Consumers maintain a prepaid balance on their smartphones, which can be used to make payments to a variety of machines including vending. When users are in “PayRange”—or about arm’s length from the machine—they receive an alert and can then immediately “swipe” their finger on their smartphone’s touchscreen to send payment to the machine via a Bluetooth LE connection.