 We're all looking for ways to save more and spend less. But there are everyday essentials you can't cut out of your budget, like gas and groceries. Here's the money-back hack I use to get cash back on these everyday purchases and more. It's called Upside. Upside is an incredible app for anyone who buys gas, groceries, or dines out. And who doesn't? That's why it's my favorite secret weapon for saving money. I got $10 back on groceries.