I am in love with the Fetch Rewards app as it is quite easy to use. It is no longer computerized like Pei above. However, you could integrate the two to make extra cashback by merely snapping an image of the receipt.
Fetch has partnered with almost 250 famous brands, and while you purchase any of these, you can get points.
After that, you may redeem the points for gift cards to places such as Gap, Staples, Sephora, Best Pay, and much more. (I have been cashing in for 10 dollars through Amazon gift cards.)
It’s also a form of a fabulous tool for tracking the spending around time and multiple stores.