How Tulna works and our promise
Our promise
- Free, funded only by voluntary donations.
- No affiliate links. Every "Go to the shop" link is a plain link to the shop's own page. We sign it so nobody can swap it for a commission link, and we earn nothing from it.
- No selling data. We do not keep what you search, there are no accounts. We keep only product prices, to spot fake discounts.
- Honest about gaps. If a shop does not answer, we say so. If we have too little data, we say "not enough data" instead of guessing a BUY.
How the verdict is made
Each offer gets a score out of 10: price 35%, quality 25%, trust 20%, delivery 10%, returns 10%. BUY needs 8 or more, CAUTION is 6 to 8, SKIP is below 6. Missing facts are left out and shown as lower "data confidence". The verdict is ordinary code you could check by hand; AI is only used to understand messy questions, never to decide.
Where prices come from
Tulna reads shop pages the way a polite visitor would: it follows each site's robots.txt, identifies itself as TulnaBot, and waits between requests. If a shop blocks automated reading, Tulna does not try to get around it; it tries a licensed price-search service, and otherwise shows that shop as "could not check". Shops can ask us to stop at any time.
Found a wrong price?
Use "Report a wrong price" under any result. Prices change fast and shops differ by city, so always confirm on the shop before paying.