The best money-making apps 1. Ibotta How it works: Ibotta lets you earn cash back on in-store and online purchases at over 2,000 supported retailers. Originally for groceries, it has expanded to include clothing, entertainment and eating out, pet supplies and other categories. Offers can be product or retailer-specific. For others, you’ll need to complete an additional task such as watching a video or taking a poll. There are three possible ways to earn cash back in stores: Add offers and submit your receipt in the app after your shopping trip (you have 7 days to send in your receipt through the app), link your retailer loyalty accounts or purchase a retailer gift card through the Ibotta app. For online purchases, you shop through the app or with the Ibotta browser extension on your computer. Payment: PayPal, digital gift card or direct to a bank account. Pros: You’ll receive cash back on in-store purchases quickly — typically within 24 hours. Ibotta also offers a welcome bonu...