Frequently asked questions

What is the delivered total?

The delivered total is the item price, plus shipping to your destination, plus the import fees deposit. Your destination is the country in Amazon’s “Deliver to” box on the page you are on.

The extension reads each part as Amazon quotes it on the product page, in the currency the page shows. If Amazon displays a total that is higher than that sum, the displayed total is used.

To rank the stores, each delivered total is converted to your display currency at the day’s exchange rate. The page you are on is always the reference: the saving and the difference on each row are measured against its delivered total. Click a row in the ranked list to see each part in that store’s own currency.

Why does it say import fees are not shown, and do I still pay duties?

Amazon quotes import fees for an address abroad only on some pages. On amazon.com, for example, they are in its AmazonGlobal details. When a store’s page prices the item and the delivery but shows no import fees, its delivered total is the item price plus shipping. Any import charges collected on delivery are not included.

The popup says so wherever that total appears:

• The store’s row reads “incl. shipping, import fees not shown”.
• Its breakdown sheet shows “Not shown” for the import fees deposit.
• If it is the cheapest store, the verdict card reads “Item and shipping included. Amazon showed no import fees, so duties may still be due on delivery.”

So yes, you may still pay duties. In that case the saving leaves out any duties collected on delivery, while the price on the page you are on may include them.

What does “Check match” mean?

“Check match” is a pill on a row in the ranked list, and on the verdict card when that row is the cheapest. It means the listing was found by searching and the extension is less than 90% sure it is the same product.

A listing found under your product’s ASIN, Amazon’s own product identifier, is the same product. It counts as an exact match and never shows the pill. A listing found by searching is scored, not certain. Its confidence combines how closely the listing’s title, brand and variant match your product with how cleanly its product page could be read. A listing from your product’s brand with the same model number counts as a close title match even when the store words the title differently, but it usually still scores below 90% and so carries the pill.

Before a listing found by searching is ranked, its page is checked for your colour, pack and size. When the page shows another variant but offers yours, the extension opens your variant’s page and reads that instead; when the page does not offer your variant, the store is reported as “No confident match”. Open the listing and check the variant before you buy.

When you see the pill, also confirm that it is the same product in the same condition. Listings that score below the matching threshold are never ranked. They appear with the stores that could not be compared as “No confident match”.

Why can’t some stores be compared?

Some stores will not compare, and that is expected. They are collapsed at the bottom of the results, under a line such as “4 marketplaces could not be compared”. Expand it to see each store’s status:

You will see two of these most often. “Delivered total not quotable” usually means the store does not ship this item to your delivery country. “Could not set delivery location” means the store would not switch to, or does not offer, your delivery country. For example, amazon.com.au offers few countries. A store with that status is never ranked, because its price is for another place.

Where do the exchange rates come from?

They are the European Central Bank (ECB) daily reference rates. When the ECB feed cannot be loaded, the extension gets the same rates from Frankfurter (api.frankfurter.dev) instead.

The rates are normally downloaded once per UTC day and reused for the rest of that day. If a download fails, it is tried again on the next check. These requests carry no information about you or the product. Like any web request, they let those servers see your IP address. The popup’s footer shows the date of the rates in use. Until a check has loaded rates, it reads “ECB daily rates”.

Totals are converted to your display currency, which you choose under “Show prices in” in the popup’s settings, or on the extension’s options page. Each store prices in its own currency, so the rate your bank or Amazon’s currency converter applies decides what you finally pay.

How do I delete my data?

Everything the extension keeps is in its local storage in your browser, and nothing it stores is sent to the developer or to anyone else. How it works lists what is kept and for how long.

Removing the extension from Chrome deletes everything it stored. To clear its storage without removing it:

1. Open chrome://extensions.
2. Turn on Developer mode.
3. Click “service worker” under Across Amazon.
4. Run chrome.storage.local.clear() in the console that opens.

Removing the extension does not change back any Amazon store’s delivery location. Change it in that store’s “Deliver to” box. It also does not remove the visits it made from Chrome’s history or from your Amazon history. Clear those in Chrome and on Amazon.

The full wording is in the privacy policy, under Deleting your data.

Why does another Amazon store’s “Deliver to” box now show my country?

So that every store quotes delivery to the same place, a check may set each other store’s delivery location to the country in the “Deliver to” box of the page you started from. This is the same change as picking that country in the store’s own “Choose your location” box, and the store is left set that way after the check. For example, if you start on amazon.com with “Deliver to Switzerland”, the “Deliver to” box on amazon.de, amazon.fr and the other stores it checks then shows Switzerland.

Only a country is set, never an address. The store you started from is never changed. Your own tabs on a changed store show the new location after their next reload. To change a store back, pick another location in its “Deliver to” box. How it works explains the change in full.

A store whose box shows your country may still not ship your item there. The check then lists it as “Delivered total not quotable”. A store that does not offer your country, or whose change Amazon refuses, keeps quoting its previous place and is listed as “Could not set delivery location”. Both appear with the stores that could not be compared.

Why did “Check again” come back instantly?

A finished check is reused for 30 minutes. An older result is deleted only when exactly the same check runs again; otherwise it stays until you remove the extension or clear its storage.

If you press “Check again” within those 30 minutes, for the same product, variant, destination, “Deliver to” text and set of stores, you get the stored result back at once, and no tabs open. After 30 minutes a fresh check runs.

A stored result includes the “Deliver to” text and the address of the product page. To remove it sooner, see how to delete your data.

Does it buy anything or touch my cart?

No. It never adds to cart, checks out or buys anything. “Open on …” opens that store’s listing in a new tab. You review it and decide whether to buy it there, on Amazon.

Your saved addresses and cart are not touched, and it never reads your passwords, your orders or your cookies. It does change the delivery location of the other stores it checks.

Is it affiliated with Amazon, and does it earn commissions?

No. Across Amazon is not affiliated with or endorsed by Amazon.

It earns no commission either. Every “Open on …” link is the store’s plain product page address, with no affiliate or referral code added. The extension has no analytics and no server of its own, and nothing is sent to the developer.

Which Amazon stores does it work on?

Product pages on these ten Amazon stores:

A check covers every store switched on in the settings except the one you are on, so by default the other nine. Turn stores on or off under “Marketplaces to check” in the popup’s settings, or on the extension’s options page. Fewer stores make the check faster.

On any other site, or on an Amazon page that is not a product page, such as search results or the cart, the popup asks you to open an Amazon product page and the button stays disabled.

Why do tabs open during a check?

The extension reads each store’s prices from that store’s own pages, as Amazon shows them. So it opens those pages one store at a time, in background tabs that never take focus, and closes each tab as soon as it has been read. A check takes about 3 seconds per store.

The pages it opens are ordinary visits: they appear in Chrome’s history and, if you are signed in to Amazon, may appear in your Amazon browsing and search history. They are made by your browser with your own Amazon session and may also influence Amazon’s recommendations.

“Stop checking” cancels the run and closes any background tabs it opened. Closing the popup does not stop a check: it finishes in the background. Reopen the popup on the same tab to follow its progress.

What happens when a store shows a robot check?

A store that shows a robot check may report “No confident match” or “Could not read the page”. It is then listed with the stores that could not be compared and is not ranked. If you report a problem, say whether that store shows a robot check when you open it yourself.

What does “Stay here” mean?

It means no other store beat the delivered total on the page you are on. The verdict card turns slate and reads “Stay here”. The page you are on is the highlighted top row, and every other row shows how much more it would cost.

The card has other answers too:

• The cheapest delivered total with no saving, when the price on the page you are on could not be read. The popup still names the cheapest store but has nothing to compare it with.
• No delivered price, when none of the stores could quote a delivered price to your destination.
• “Couldn’t compare”, with the reason, when the check itself fails, for example because the exchange rates could not be loaded.

Not answered here? The support page explains how to ask the developer.