It can be connected with a bar code scanner, so someone can scan the bar code by his/her phone and check for nearest shops with the items in question (food, clothes, etc.).
With clothes - you can ask someone with sweater you like if you can scan his sweaters' bar code and then search in the web where you can buy it.
With food - you can scan food at home.
You can scan more than one item and check the lowest price for each one or for the whole package if you want to visit only one shop, etc. You can also find in web the meal you want to make (e. g. pancakes) and the program will tell you what the ingredients are and where to buy them. Of course, shops can provide a service to send food you order to your home, etc.
And that's all about this idea.
So, how can you use this idea?
