 $5,000. That's the average amount of money people in the U.S. are now spending on gas in a year. Five grand. That's crazy. If you drive, you have to download Upside, the free app that gives you cash back every time you get gas. That's right. You can earn real cash back with Upside just by buying the gas you're already buying. You can literally start earning cash back today. I use Upside every time I fill up.