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Create a website that finds the cheapest supermarket for your whole shopping list

Every supermarket shows its own prices, so there is no easy way to see which shop is cheapest for the basket you actually buy. Enter a shopping list, see where it costs least.

Posted 3h ago by The Unsolved team

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A solution must include

  1. Publicly accessible at a URL, free to use
  2. Users can enter a shopping list of at least 20 items
  3. Compares the total basket price across at least 3 major supermarkets in one country
  4. Shows the cheapest supermarket overall and the price of each item at each one
  5. Shows when the prices were last updated
  6. Works on a phone as well as a computer

How it’s verified: Live URL; A worked example with a 20-item list, and an explanation of where the price data comes from.

The first valid solution wins.

The first solution that meets every criterion wins. No end date: open until solved.

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