Spread — Price history & comparison

Spread tells you whether the price in front of you is actually a good one. Open a product page and Spread quietly records what it costs. Come back later and it tells you whether the price moved: "Lowest price in 23 days", or "$50 above the low". When it can confirm the same product cheaper somewhere else, it tells you that too. WHERE IT WORKS Spread runs on product pages at six of the largest US retail sites. Chrome shows you exactly which ones before you install, and the extension cannot run anywhere else. WHAT MAKES IT DIFFERENT Spread will not show you a price it cannot stand behind. Every number it quotes was read from that store's own listing, not a search result or a cached figure. When a price cannot be confirmed, Spread names the store and says so instead of guessing. That means you will sometimes see fewer results than other comparison tools show you. It also means the numbers are real. It is equally careful about what counts as the same product. A carrying case that mentions your headphones is not your headphones. A refurbished unit is not a new one. A bundle with a charger thrown in is not the standalone item. Two adjacent model years of the same product can be 88% identical as text and a hundred dollars apart — Spread treats them as different, because they are. HOW TO USE IT • A small Spread panel appears on supported product pages • Click it for price history and any confirmed cheaper offers • Price history needs a second visit to say anything useful — there is nothing to compare against the first time you look PRIVACY No account. No sign-up. No tracking. No ads. On supported product pages, Spread sends that product's title and price to its own service so the price joins the product's history. What gets stored is a fact about the product — "this cost $328 at this store at this time" — with no record of who saw it. Nothing you view on any other website is ever sent, because the extension cannot run anywhere else. Full policy: https://jamespost1.github.io/Spread/privacy.html Spread is open source under the AGPL. Everything described here can be verified by reading the code: https://github.com/jamespost1/Spread