Ibotta is a free app that pays you cash for buying your favorite products. When you redeem your first rebate, you will get an additional $10! And when you help teammates/friends with rebate goals, you get additional bonuses!
You unlock rebates, by watching ads or other things, and scan the item you bought and the associated receipt. It usually takes less than 24 hours for the rebate to be added to your account. You can cashout at $20, with PayPal, or any one of the many gift cards offered through the app.