How we verify prices

A new product is checked at least once a day for its first 14 days, while it builds its history.

After that: a product with a current deal scored 70 or more every 8 hours; one with a smaller deal every 20 hours; one that had a deal in the last 30 days, or that someone has a price alert on, once a day; any other product at least every 3 days; one with no deal in 60 days at least once a week.

During big sales such as Black Friday, products with a deal now or in the last 30 days, and products with a price alert, are checked more often. Every card says when we last checked ("Price checked 2h ago").

A typical price needs history: 14 days and at least 7 good checks. Until then we compare with Amazon's list price on our latest check.

The discount then shows only when the price is at least 10% below the list price and not above the middle of the past week's checks, and the product page says it is against Amazon's list price. When our checks find the same price 5 times over 5 days or more, no discount is shown and the list price earns no points in its score: it is not what the product really costs. Until a product has its full history, its score can't go above 80.

If a check finds no price, or the product can't be bought from Amazon's main offer, that check doesn't count towards its history. The product leaves our lists and its page says "Currently unavailable".

After three such checks in a row we take its page offline, and put it back with the first check that finds a price again. Products we don't track show no LUKTAT price at all.

We give each product a score from 0 to 100: the size of the real discount, where the price sits in its own history, customer feedback and demand on Amazon (we use them for the score but don't show the figures), extra savings from a coupon, and urgency (an end time or a Lightning Deal).

A product shows as a deal only when it scores 70 or more, was checked in the last 24 hours, can be bought, is at least 10% below its typical price (or list price while new, unless our checks show the price unchanged), and is rated 4.0 or higher by at least 50 customers on Amazon. Amazon's own devices don't need the rating.

"Hot deal" means a score of 85 or more, checked in the last 12 hours. A drop of more than 80% is held back until we have looked at it by hand. Every other product with a checked price is listed under "All verified prices"; it is not called a deal.

Pick a price on a product we track and leave your email. We email you once to confirm. After that, when a check finds the price below yours, we email you: one email per drop. Every email has an unsubscribe link.

As an Amazon Associate, LUKTAT earns from qualifying purchases made through our links. What we earn plays no part in a product's score.

We don't show Amazon star ratings, review counts or "bought in past month" figures. Amazon sets the price and can change it after our check; the price on Amazon when you buy is the one that counts.