I use my smartphone to make money in my free time. The best part is, all the apps I use are free!
Check out some more apps that pay money, prizes, and gift cards:
Update: They now accept receipts from pet stores too! You earn one free spin on their slot machine after submitting a qualifying receipt. You can win additional coins with the slot machine. I've used this app for 9 months now, and so far so good.
This app will give you points for grocery store receipts. Stores that sell food items also qualify, such as CVS, Target, and Walmart.
Receipts less than $10 earn 5 coins
$10-50 earns 10 coins
$50-100 earns 15 coins
1000 coins is equal to $5. It may take awhile to accumulate the coins, but if you shop for groceries, then there's no harm in earning some cash for it since you already have the receipts!