While it is important these days to try and save every penny, there is something to be said for the amount of time it takes to actually find and research these savings. So when something comes along that saves you something after the fact, that's a pretty good deal in my book.
The Walmart savings catcher is something that I noticed on the bottom of my Walmart receipt while wondering why light bulbs were so expensive (what's up with that, anyway) and seeing the QR code at the bottom of the receipt.
It is a pretty simple concept, the user downloads an app to a smartphone, scans the QR code at the bottom of the receipt and app compares the prices of local stores and what Walmart charged and gives you back the difference on a gift card.
It sounds too good to be true, but so far it seems to be working as advertised. The past three times my wife went to Walmart, I scanned in the receipt and in a couple of days (The savings are not instant) I got a notification that I had saved money using the app.
I don't like Walmart so much, but sometimes there's no other option, and this might save some money with very little effort, and that I do like. The app is available on iOS and Android.