I'm one of those people that are hesitant about using an "app" to make money, but I have to give major props to Ibotta, because I have made some good money on it. It does not require giving up any personal information (like a credit card, etc). But I am seriously making some good cash on this app, I am up over $450 dollars and I have just started using it.
So here's how it works. You download the app and you make money two ways:
1) You launch another application from Ibotta, such as Uber, Hotels.com, Amazon.com. Uber and Hotels.com is primarily how I have made a lot of my money from the app. I simply launch Uber from Ibotta and I get $1.00 back for every ride I take. Other applications such as hotels.com, you can get as much as 5% back, I have seen it as high as 10% at some times.
2) Check out the application and there will be "coupons" on the site. Something like, "if you buy green bell peppers, you get $1 back." There are TONS of "coupons" on the site. One of my favorite is to check out the application when I am at a bar and see if there are any drink specials (which there normally are). Then once you purchase, you just simply scan your receipts from popular stores!
It's an app I highly recommend and you can see some of the deals below.
If you use this link it will also give you $10 for giving it a shot. And usually there is a $20 bonus you can get if you start using the app immediately.