How prices become evidence.
This page documents the definitions behind Dipp's price history and deal rankings. The methodology was last reviewed on August 27, 2026.
Source and market
Dipp tracks product and offer information from Amazon.ca for Canadian shoppers. Prices are shown in Canadian dollars. Dipp is not the seller, does not control inventory and cannot guarantee the price that appears when you reach Amazon.ca.
Periodic checks
A recorded point is the price observed when Dipp checked a product. Checks occur periodically through the day, but the history is not a minute-by-minute record. The timestamp beside a price identifies the observation behind it.
“Lowest recorded” and reliable history
“Lowest recorded” means the lowest price Dipp has observed since it began tracking that product. It does not claim to be an all-time Amazon low. Dipp waits for at least three recorded observations before using the history to judge whether a current price is close to that low.
Verified discounts
A verified deal is currently available and at least 5% below a comparison price Dipp is willing to stand behind. Which price that is depends on what Dipp can show. For a widely recognised brand it is the reference price returned with the offer, because the brand name itself gives a shopper something to judge it against. For every other seller it is Dipp's own observed median, and only once there are at least ten observations spanning fourteen days — long enough that a short promotion or an inflated launch price cannot manufacture a comparison.
A reference price is a claim by the seller, not a fact, so Dipp's own record overrules it. Where a product is selling above the price Dipp has typically recorded for it, no discount is shown at all — whatever the reference price implies, and whoever makes it. A product with too little history to judge shows no discount rather than a guess. The percentage is never presented as proof of value on its own: the recorded low and the full price history sit beside it.
Ranking
Deal order combines current discount, proximity to Dipp's recorded low, freshness, brand recognition, Amazon fulfilment and recent shopper interest such as views, saves, alerts and outbound clicks. Logarithmic weighting prevents one popular product from permanently overwhelming a page, and category listings limit repeated products from the same brand.
Which products get their own indexed page
Dipp tracks far more products than it asks search engines to index, and that gap is deliberate rather than an oversight. A product page is only submitted once Dipp has something to say about the price that the Amazon.ca listing does not already say: several recorded observations, a price that has actually moved during that time, and a current price that sits meaningfully below what the product usually costs. Products that are unavailable, that have no recorded movement, or whose department Dipp has not established are tracked and readable, but not submitted.
The reason is that a search engine’s willingness to crawl is limited, and spending it on a page that repeats the listing makes the pages with real history harder to find. A product excluded today is included as soon as its record justifies it; nothing is deleted, and the price history keeps accumulating either way.
Corrections and limitations
Variant changes, third-party sellers and rapid offer updates can produce temporary mismatches. Dipp retries scheduled checks and labels unavailable products instead of presenting stale inventory as current.
If something on this site looks wrong — a price that does not match the Amazon.ca listing, a product in the wrong department, a discount measured against a comparison you do not recognise — report it to hello@dipp.ca. Include the product link or its ASIN. The same address receives questions about the definitions on this page, and the person who operates Dipp is responsible for the methodology and for any correction made to it. Corrections to a published price report are noted on the report itself rather than applied silently.