How to compare · 2026-05-17
Common grocery price comparison mistakes
The easy mistakes that make a product look cheaper than it really is.
Comparing pack price instead of unit price
A small pack can look cheap because the shelf price is low. A large pack can look expensive because the total is higher. Unit price makes the comparison fairer.
Comparing mixed products as if they are pure products
A broccoli mix is not the same as broccoli florets. A burger is not the same as mince. A ready meal is not the same as raw meat. Good comparison needs product families, not just keywords.
Letting diet filters drift
Diet tags must stay sensible. A paleo or keto filter should not bring in wipes, supplements or unrelated health products. The site is being improved so diet filters behave more like a shopper would expect.
Ignoring stock and branch differences
Online price data is useful for planning, but stock and local branch details can vary. Always check the retailer before relying on a product for the actual shop.
Use the live comparison
The article explains the thinking. The live table shows the current captured rows and links back to retailers for verification before buying.