You seem to be spot on. Major outlets and retailers, like you say, already compete on items for penny differences. Nobody is going to look up on their phone t

You seem to be spot on. Major outlets and retailers, like you say, already compete on items for penny differences. Nobody is going to look up on their phone that they could buy Granola bars for $.05 cheaper at Walmart than at Wegmans. The purpose of this app is convenience, however there seems to be little point to it if the concept itself is flawed for the reasons you've just stated.