Every Amazon shopper has felt the same doubt: is this price actually a good deal, or did the retailer inflate it before a promotion? Without seeing the full price history, you're buying blind. Histozon is a free browser extension that displays Amazon price history directly on product pages, covering 13 Amazon stores (France, Germany, Italy, Spain, and the UK) with a cross-country comparison that no other free tool offers. Install it once, and every Amazon visit becomes an informed decision.
What Histozon does for Amazon shoppers
Histozon embeds a price history chart on any Amazon product page you visit. The moment a page loads, the extension pulls historical price data and renders an interactive graph showing how the listed price has moved over time. You can see the all-time low, the 90-day average, and whether today's price is genuinely below the norm or suspiciously marked up to make a discount look bigger than it is.
Beyond the chart, Histozon surfaces key metrics at a glance:
- Current price vs. historical average, instantly know if you're above or below the mean
- All-time lowest price, with the date it was reached
- Price drop alerts, set a target price and get notified when the product hits it
- Stock availability history, spot patterns in out-of-stock events that signal genuine demand
The tool works on Amazon.fr, Amazon.de, Amazon.it, Amazon.es, and Amazon.co.uk without switching tabs or copying ASINs into a separate website.
How Histozon tracks prices (the technical side, simply explained)
When you land on a product page, Histozon reads the product's ASIN (Amazon's unique item identifier) and queries its own database of historical price snapshots. The database is built by continuously monitoring prices across all 13 Amazon stores, capturing changes as they happen rather than relying on sporadic checks.
Price history depth on the free plan covers up to 12 months of data, giving you a full seasonal view, critical if you're watching an item that goes on sale every Black Friday or Prime Day. The Pro plan extends this to the complete available history, which for popular products can span several years.
The chart itself is interactive: hover over any point to see the exact price on that date, zoom into a specific window (30 days, 90 days, 1 year), and toggle between the main Amazon listing price and third-party seller prices. All of this runs inside your browser without redirecting you away from the product page.
For price alerts, Histozon sends an email notification when the tracked product drops to or below your chosen threshold. You can track up to 20 products simultaneously on the free tier.
The cross-EU comparison: Histozon's killer feature
This is where Histozon separates itself from every other price tracker on the market. When you're viewing a product on Amazon.fr, the extension also shows you the current price for the identical product on Amazon.de, Amazon.it, Amazon.es, and Amazon.co.uk, converted to your local currency in real time.
Why does this matter? Amazon prices vary significantly between EU countries, sometimes by 20 to 40% for the same ASIN. Electronics, books, and household appliances are frequent offenders. A product listed at €89 in France may be €61 in Germany, and with Amazon's cross-border shipping available in most of the EU, buying from a cheaper marketplace is often straightforward.
- France, Italy, Spain (amazon.fr/.it/.es), often competitive on fashion and beauty
- Germany, Netherlands, Belgium, Poland, Sweden, often the cheapest EU stores for electronics and tools
- Italy (amazon.it) and Spain (amazon.es), lower prices on home goods and food products
- UK (amazon.co.uk), priced in GBP, which fluctuates relative to the euro and can offer unexpected bargains
No other Amazon price comparison tool covers all 13 Amazon stores simultaneously in a single free extension. See our dedicated Amazon price history guide for a deeper explanation of how cross-marketplace arbitrage works.
How to use Histozon: a step-by-step guide
Getting started takes under two minutes:
- Step 1, Install the extension. Add Histozon to Chrome from the Chrome Web Store. No account required to see price history charts immediately.
- Step 2, Visit any Amazon product page. The Histozon panel appears automatically below the main product image. No clicks needed.
- Step 3, Read the chart. The default view shows the last 90 days. Use the time selector to switch to 30 days or 12 months. The grey band shows the average price range; dots mark significant drops.
- Step 4, Check the EU comparison. Scroll down in the panel to see the live price on the four other marketplaces, with shipping estimates where available.
- Step 5, Set an alert (optional). Click "Track this product," enter your target price, and confirm your email. Histozon handles the rest.
The extension is lightweight (under 800 KB) and does not slow down Amazon page loads. It requests only the permissions it needs: access to amazon.* domains and storage for your tracked products list.
Who benefits most from Histozon
Histozon fits several distinct profiles of Amazon users, each with different priorities:
- Everyday shoppers, verify whether a "deal" is real before buying. Fake discounts (where the list price is inflated weeks before a sale) are common; the chart exposes them instantly.
- Resellers and eBay sellers, identify products that regularly dip to wholesale-like prices on Amazon, buy at the low, and resell at the norm. The 12-month history makes seasonal dip patterns visible.
- Gift buyers, plan purchases around predictable price drops (Black Friday, Prime Day, post-Christmas clearance) rather than buying at peak pricing.
- Expats and cross-border shoppers, already comfortable ordering from multiple EU Amazons, they use the country comparison to route each order to the cheapest source.
- Price-sensitive category buyers, baby products, supplements, and pet food see frequent price volatility; tracking 10 to 20 staples and buying at dips adds up to meaningful savings over a year.
Histozon vs Keepa and CamelCamelCamel: the real differences
Both Keepa and CamelCamelCamel are well-established tools with strong data, but they have limitations that matter in the EU context.
Keepa requires a paid subscription (approximately €19/month) to access full price history. Its free tier shows heavily throttled data. Keepa does cover multiple Amazon marketplaces, but its interface is complex and not designed for casual shoppers. Histozon is entirely free for core history and comparison features.
CamelCamelCamel is free and has excellent US data, but its EU marketplace coverage is thin. The website-only model means you must copy ASINs and leave the Amazon tab, adding friction. Histozon works inline, on the page, across all 13 Amazon stores simultaneously.
The decisive gap is the cross-EU live comparison: neither Keepa's free tier nor CamelCamelCamel shows you today's price on all 13 Amazon stores side by side on the product page itself. For European shoppers, this feature alone justifies choosing Histozon.
Pricing: free tier vs Pro
Histozon is built around a genuinely usable free plan:
- Free: full price history charts (12 months), cross-EU live comparison, up to 20 tracked products with email alerts, all 13 Amazon stores
- Pro: unlimited tracked products, complete price history (beyond 12 months), price drop statistics and deal score, priority alert delivery, and API access for developers
For the vast majority of shoppers, the free plan covers everything needed. Pro is aimed at power users tracking large product catalogues or resellers who need deeper historical data and faster alerts. There is no credit card required to start.
Privacy: what data Histozon collects
Histozon does not read your Amazon account, order history, or personal information. The extension reads only the ASIN on the current product page to fetch price history. Your tracked products list is stored locally in your browser and, if you create an account for alerts, on Histozon's servers in an anonymised form linked to your email address only. No browsing data outside Amazon product pages is ever collected or transmitted.
Frequently Asked Questions
Is Histozon really free to use?
Yes. The core feature set, including 12 months of price history, the 13-country EU comparison, and alerts for up to 20 products, is entirely free with no credit card required. A Pro plan exists for heavy users who need unlimited tracking and full history depth, but the free tier is fully functional for everyday shoppers and covers everything most users need.
Which Amazon marketplaces does Histozon support?
Histozon currently supports Amazon.fr, Amazon.de, Amazon.it, Amazon.es, and Amazon.co.uk. The cross-country comparison panel is visible on all 13 marketplaces: whichever one you're browsing, you'll see live prices from the other four alongside. Support for additional marketplaces is planned for future updates.
How far back does the price history go?
The free plan shows up to 12 months of price history. For popular products that have been sold on Amazon for years, the Pro plan provides the complete available history, which can stretch back three to five years for established listings. Twelve months is generally enough to identify seasonal pricing patterns and evaluate current deals.
Does Histozon work with third-party sellers on Amazon?
Yes. In addition to the main Amazon listing price, Histozon can display price history for the lowest third-party seller offer on a given product. This is particularly useful for marketplace categories like books, collectibles, and refurbished electronics, where third-party prices often vary considerably from the Amazon-direct price and can be significantly cheaper.
How does Histozon compare to using Amazon's own price history?
Amazon does not provide any public price history to shoppers. The platform actively discourages price transparency because historical data reveals how often "discounts" are manufactured by temporarily raising the reference price. Histozon fills this gap by independently tracking prices over time, giving you the objective view Amazon won't. It is the only way to verify whether a deal is genuine before buying.
Can I use Histozon on browsers other than Chrome?
Histozon launched as a Chrome extension and is compatible with all Chromium-based browsers, including Microsoft Edge and Brave. A Firefox version is in development. If you use Safari on macOS, you can still access historical price data through the Histozon web interface by entering an ASIN or product URL directly.