How prices and deal signals are calculated.

The tracker reads structured prices on publicly accessible retailer product pages when automated access is permitted. It also accepts authorised retailer feeds, affiliate network feeds and product APIs. Every published offer identifies its retailer and checking time. A retailer is not excluded merely because its link earns no commission.

Offers are matched using the product slug, model number, manufacturer code, barcode, brand and exact title. Ambiguous or low confidence matches are rejected. Capacity, colour and pack variants remain separate when they are not directly comparable.

Observed prices are stored over time. The typical price is based on recent valid observations, while the recorded low is the lowest eligible price in the stated period. Shipping and membership requirements will be identified when known.

Current offers are ranked by the available total. That means delivered price when the source supplies delivery, or item price when delivery is unknown. Every unknown delivery cost is labelled, and affiliate commission never changes the order.

The signal considers the discount from the recent typical price, distance from the recorded low, data freshness and offer availability. Affiliate commission does not increase a score.

Retail prices can change quickly. If a price, product match or availability record appears wrong, contact us with the page address and retailer evidence so it can be reviewed.