koomza — check before you buy

A “sale” tag only says the price is lower than what the shop set. It doesn’t tell you whether it’s actually cheap, and the same product can differ by thousands of baht between shops. So koomza brings prices from many shops together in one place, keeps price history, and uses rules we can publish to say which price is good — not opinion, not advertising.

• Compare prices of phones and cameras across shops, sorted from cheapest to most expensive, with stock status
• Price history — the lowest, the average, and where today’s price sits compared with the past
• One Piece cards — more than 2,700 cards from every set, showing every version (Regular, Parallel, SP, etc.) with English/Thai names. Search by card number or by English, Thai or Japanese name
• Pick by budget — tell us your budget and we pick in-stock models within it, with reasons (e.g. a phone under 5,000 baht or a compact camera under 20,000 baht)
• Check prices for many cards — paste the card numbers for a whole stack and get every card’s price and the total value at once
• Price alerts through your browser when the price drops to your target, no sign-up needed
• Works like an app — add it to your home screen (PWA), it opens fast, and articles you’ve opened can be read even offline (price pages can use a saved copy for no more than 5 minutes)

1. 🏪1. Read prices from shopsOnly pages robots.txt allows, spaced out so we don't burden the shop
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2. 💱2. Convert to bahtForeign shops use the day's mid-market rate, excluding shipping/tax
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3. 🧹3. Filter out odd pricesCards: a price more than 5× off the reference shop is treated as a different card and not shown
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4. 📊4. Compare and keep historyRank in-stock shops by lowest price, store daily prices
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5. 🔔5. Alert when it hits your targetWhen the price drops to your target, you get a browser notification

Products with the “● Live price” badge use prices the system reads directly from shop websites, updated every 6 hours, from these shops:

See the live list of shops, item counts and latest update times on Data sources. Prices from foreign shops are converted to baht at the day’s mid-market rate (Frankfurter), not including shipping and import tax.

• We only read pages the shop allows in robots.txt, and always identify our bot (koomza-pricebot)
• We wait at least 3 seconds between requests to each site and fetch once every 6 hours, so we don’t burden shops
• If a shop refuses (e.g. blocks bots), we stop fetching from that shop. We don’t get around protection systems, and we don’t use a shop’s internal APIs that aren’t open for use
• We skip products whose price isn’t a real selling price, such as pre-orders that only show a deposit, and accessories mixed into camera categories

• We only say what we know — sample data must be labelled, prices for out-of-stock items must say they’re the last known price, and the “below average” badge only appears once we have at least 7 days of prices
• Open rules — price badges and the pick-by-budget tool use fixed formulas explained in our articles (price history · pick by budget)
• We respect copyright — some card images are real images used only to identify the card, supplied through a card data provider with a copyright credit under the image. Cards without a real image use a mock-up we designed ourselves (copyright ©Eiichiro Oda/Shueisha/Bandai) · Card pages earn no money from images or links, and we remove images immediately if the rights holder asks · English/Thai card names come from a dictionary we compiled ourselves
• No user tracking — no user accounts, no email collection, no ad tracking or behavioural analytics

koomza is developed by a small team that uses AI as its main assistant, which makes it possible to keep thousands of items up to date:

• System development — the price-fetching system, web pages and tests are written and reviewed by AI together with the team
• Card name translation — more than 500 event card names were translated from Japanese into English and Thai with AI (labelled “Name translated by koomza”)
• Content — articles and explanations on the site are drafted with AI, then checked against how the system actually works

For anything that affects the money in your pocket — prices, price badges and budget recommendations use fixed rules that can be checked; AI is never left to guess, and the system doesn’t send your data to AI providers · Details in the Terms

Our main income comes from affiliate programmes of shops and platforms (e.g. Shopee, Lazada). If you buy through an affiliate link, we may earn a commission from the shop while you pay the same price. These links are labelled. Shops are always sorted by price; commissions have no effect on the ranking, price badges or budget recommendations. Ad space is clearly labelled “Sponsored”, and links in the card section are ordinary shop links · Details in Terms, section 4

koomza is in its early stage. We’re steadily adding shops and price sources (e.g. major online marketplaces through officially offered channels). Real price history has only just started being collected, so charts and discount badges will become more complete as we collect data for longer. Before every purchase, please double-check the price and conditions on the shop’s page.

koomza operates under the laws of the Kingdom of Thailand, and the system is designed to comply with the following relevant laws:

• Personal Data Protection Act B.E. 2562 (2019) (PDPA) — Thailand’s data protection law. We collect only what’s necessary, have no user accounts, state our purposes and legal bases, and support the rights of access, correction, deletion and objection
• Computer-Related Crime Act B.E. 2550 (2007) (amended 2017) — we keep the system secure and never fetch data from any website beyond what is permitted
• Consumer Protection Act B.E. 2522 (1979) — no exaggerated advertising; we clearly state which parts are sample data and which are affiliate links or ads (Sponsored)
• Copyright Act B.E. 2537 (1994) and Trademark Act B.E. 2534 (1991) — card images and brand names are used only to identify products, with the copyright owner credited, and there is a way to report infringing content
• Electronic Transactions Act B.E. 2544 (2001) and Unfair Contract Terms Act B.E. 2540 (1997) — the terms of use take effect online and don’t limit consumer rights beyond what is fair

Details for each are in the Terms

The only data we store is a random device ID and your alert settings. Full details and your rights under the Personal Data Protection Act are in the Terms

koomza is provided through this website only; there are no agents or other channels using the same name · The service provider and personal data controller is Nitas Srisanoi (an individual, not a company; team MN CoreAxis) · For questions, problems, wrong prices, or shops you’d like us to add: software.mn.coreaxis2026@gmail.com