Barcode Scanner Pro for Amazon Shopping is a free app that helps you to compare prices of the same product between Amazon and your local store. You don't need to log in or create an account, and there is no need to add your credit card information.

You just need to open the app, scan the product code, and click on the button to see the price. You can also add products to the list by scanning the barcode on the product code. Then you can add the products to the list and compare the prices.

There are two things you need to pay attention to when using the app. The first is that you need to make sure you are using the barcode reader of the app and not the camera. The second is that you need to make sure the lighting is good. If the lighting is not good, the barcode may not be recognized, and the app may not work properly.

Barcode Scanner Pro for Amazon Shopping is a free app, and there are no ads or other forms of monetization.