Unlike the Walmart Scan and Go feature, which is only available to Walmart Plus members, anyone can use the free Walmart price checker tool. All you have to do is download the official Walmart app (iOS/Android). You'll likely see other Walmart price checker apps on the app store (with names like "Barcode Scanner for Walmart"), but I'd avoid these at all costs. In my experience, they don't do what they promise, and many recent app store reviews support this.

Once you’re in the official Walmart app, tap “Services” on your bottom menu, then select “Check a price” to open the Walmart barcode scanner. Then point the camera at the item’s barcode to bring up the product listing information and the price. PRO TIP: Make sure you have your location services turned on (or connect to in-store Wi-Fi) so that you get accurate prices. With in-store Wi-Fi, you may need to enter your email address to gain access, but you don’t need a Walmart online account.

Not all Walmart stores have physical price scanners anymore (since they really want you to use the Walmart app now). But if your store does still have a physical price checker machine, you can use it the same way as the barcode scanner in the app. Ask any Walmart associate if your store has a price scanner and where it’s located. Then round up all the clearance items you want to scan and bring them over to the scanner to check prices.