Upside Gas Savings (10-50 cents per gallon) (DC, Virginia, Maryland only)

Never pay the gas price on the station sign again! With Upside, you get cheaper gas at any nearby station in the Washington D.C., Baltimore, and Northern Virginia areas by earning up to 50¢/gal cash back. Plus, earn coupons for cash back on services like car washes and oil changes, and convenience store items.
Works at 650+ stations in the area, including all the big brands (Exxon, Shell, Sunoco, etc) and works with any other fuel rewards card. With Upside, gas stations compete for your business with better prices than you’ll see anywhere else, in the form of cash back. No gimmicks, no catch, just a free app to help you earn cash back.
How it works:
• FIND cheap gas near you– up to 50¢ per gallon below the gas price on the sign
• PAY with any credit or debit card, and snap a picture of your receipt
• EARN cash back and get it whenever you want, via PayPal or check