How we calculate deals

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Daily Deals are a big deal on PriceSpy. We want to help you find the best offers every day. That’s why we closely track price trends and review store pricing to identify the best deals on the market. With us, you can trust that a deal is truly a deal.

How we identify deals

✔︎ Track price trends for three months

✔︎ Analyse the entire market, including seasonal and popular categories

✔︎ The product price is lower than expected compared to the price trend

How Daily Deals work on PriceSpy

Our method for identifying Daily Deals is based on price data. We track a product’s lowest market price day by day over a three-month period to calculate a price trend. When the price falls below the trend, we classify it as a deal.

This method helps us spot genuinely lower prices – for example, we can detect fake sales where a price drop follows an artificial price increase.

The importance of price history

It’s hard to know if a product’s price is truly good value. Does the price usually drop during sales periods? Our price history provides a clear view of how prices have changed over time. It includes all price changes, both up and down, for all store prices linked to products on PriceSpy.

The main graph in the price history shows the market’s lowest price, but you can also see how prices have developed in individual stores. By checking the price history, you can determine whether a sale offer is as good as it seems – helping you make better decisions.

Price history is based only on brand-new items, not second-hand products, regardless of condition.

The price trend

To identify deals, we create a price trend using price history and linear regression. The price trend provides insights into how a product’s price is evolving in the market and gives an indication of the expected price for the day, which we compare with the actual lowest price.

If a product’s price is at least 5% lower than the expected lowest daily price, we categorise and label it as a deal.

How we display deals

The product must be sold by at least three stores.
The product must be in stock or on the way and available for order.
We only search for deals in seasonal and popular categories.
We display the percentage showing how much lower the price is compared to the trend.

What if the store doesn’t call It a sale?

PriceSpy classifies an offer as a deal based on the price trend – not the store. This means that a store’s sale offers don’t always appear on our deals page, but we include any offer that meets our criteria.

We’re Here for You!

We believe it’s important for you to understand how we work. You’ll find all the details in our transparency pledge.

Read full transparency pledge here.

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