Yup, it is that simple. Shop at Wal-Mart, log-on, and save: Wal-Mart will do the comparison shopping for you and return the difference. Wal-Mart will also tell you which stores are they going to compare their prices from and it is a pretty good list! It is still in beta, and therefore available in selected markets.
What is covered? CBS reports that, “(this app) compares its prices on 80,000 food and household products — from canned beans to dishwashing soap — with those of its competitors.” It only covers the purchases in the Wal-Mart stores and not purchases made online.