US-centric: Compare sales at numerous local grocers with GroceryGuide, a webapp that accesses sales from hundreds of supermarkets and chains around the nation. GroceryGuide shows price trends and fluctuations as well as recipes that can be made with each food item. Additionally, the site lists coupons that can be further applied to discounted items. While GroceryGuide is missing one of my favourite supermarkets on its list, it still has a decent representation of many chains throughout the country and does a good job locating bargains without the need to visit each individual shop's website to view the circulars.
Compare Grocery Store Sales with GroceryGuide
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