CoinMobile allows you to pay change with your phone. No more Hassle of loose change when paying in cash. No need to break your bills because you owe the clerk 9 cents for something that cost $5.09 and all you have is a $5 bill and $10 bill. Just give the clerk $5 in cash and use your CoinMobile app to pay the rest. Open up the CoinMobile app, scan qr code on the sticker next to register, input amount and press pay and you are done. Hassle Free!