Before you buy, let seven factors compare it for you
A shopping assistant that runs in your own browser. Describe what you want in one sentence; it looks for the same product at ten stores in Canada and the US, and ranks the results by brand, sales, price, shipping, after-sales, reputation and value. Your data stays on your computer, and we take no commissions from any retailer.
What it does
Search and scoring are free. The watchlist and savings log need a subscription.
Find the same product across stores
Prices for the same item often differ by more than half between stores. Heptapick recognizes the same model on different sites and puts them side by side.
Seven-factor scores, your weights
Care more about price or reviews? Drag the weights and the ranking updates instantly, without going back online. Data a store doesn’t publish is left out of the score rather than guessed.
Price watch Subscription
Your own computer records the price of watched items once a day. After 8 days it can tell you whether it’s a good time to buy, and flags fake sales where the price went up before the “discount”.
Savings log Subscription
Clicking “Buy” records what you paid against the highest price for the same item at other stores. If only one store had it, it logs 0 — no inflated savings.
Install
The extension isn’t on the Chrome Web Store yet, so you install it with the browser’s built-in “Load unpacked” option. The steps below use Chrome; Edge, Brave and others work the same way with slightly different menu names.
Download and unzip
Download heptapick-extension-0.2.0.zip and unzip it. You’ll get a folder named
heptapick-extension(on Mac, double-click the zip; on Windows, right-click → “Extract All”).Keep this folder in a permanent place — don’t delete or move it. The browser runs the extension directly from this folder. If it’s deleted or moved, the extension stops working and your subscription link is lost. Put it in Documents rather than Downloads.Open the extensions page
Type
chrome://extensionsin the address bar and press Enter.In Edge use
edge://extensions; in Brave usebrave://extensions. For security reasons a web page can’t open this address for you — you need to type it.Turn on Developer mode
Switch on Developer mode in the top-right corner of the page.
Load the extension
Click Load unpacked at the top left, select the
heptapick-extensionfolder from step 1 (the level where you can seemanifest.json), and click “Select”.When Heptapick 七维选品 appears in the list, you’re done.
Pin the icon to the toolbar
Click the puzzle icon 🧩 at the top right of the browser, find Heptapick 七维选品 and click the pin. The purple heptagon icon will stay in your toolbar — click it to open Heptapick.
Mac: use it as a desktop app (optional)
Once the extension is installed, you can add a launcher that opens Heptapick in its own window from the Dock, like a regular app.
Download the launcher
Download Heptapick-mac.zip, unzip it to get
Heptapick.app, and drag it into your Applications folder.Open it the first time
Double-click it. If macOS says it can’t be opened or can’t check it for malicious software (the launcher isn’t signed by Apple), go to System Settings → Privacy & Security, find Heptapick near the bottom and click Open Anyway. You only need to do this once.
The launcher finds the browser where you installed the extension and uses your existing store logins. In the browser, ⌘ ⇧ 7 (Ctrl Shift 7 on Windows) opens the same window.
How to use
Click the heptagon icon in the toolbar to open the side panel; if your browser doesn’t support side panels, a separate window opens instead. You can switch between 中文 / English / Français at the top of the panel at any time.
Choose a country
Pick 🇨🇦 Canada or 🇺🇸 United States at the top. Stores and currencies differ, so results are never mixed.
Describe what you want
Type a sentence in English or Chinese, like “quiet robot vacuum that’s easy to maintain” or “noise-cancelling earbuds under $100 with long battery life”. Then click Smart pick.
To narrow by brand, model, price range or minimum rating, open Filters.
Watch results arrive, adjust the weights
Results are ranked as each store responds, so the first batch shows up in seconds and the rest fill in. Drag the seven weights and the ranking changes immediately. Sources shows which consumer research the default weights come from; Reset puts them back.
Watch it or buy it
Not ready to buy? Click ☆ Watch and follow the price trend and buying-time signal on the Watchlist tab. Ready? Click Buy to go to the store — the purchase is logged in your Savings log.
Subscription · US$5/month
Heptapick takes no commissions, referral fees or ranking fees from retailers, so the ranking answers only to you. That means it’s supported by subscribers. Renews monthly; cancel anytime in one click.
| Feature | Free | Subscription |
|---|---|---|
| Search across ten US and Canadian stores, same-product matching | ✓ | ✓ |
| Seven-factor scores, adjustable weights, filters | ✓ | ✓ |
| Price watch: trends, buying-time signal, fake-sale flags | — | ✓ |
| Savings log | — | ✓ |
How to subscribe
Open “Watchlist” or “Savings log” in the extension
If you’re not subscribed, you’ll see a Subscribe · US$5/month button.
Pay
The button opens Stripe’s secure checkout. Your card is handled only by Stripe — we never see it.
Back in the extension, click “Check again”
After paying, return to the extension and click Check again. It usually takes effect within seconds.
How to cancel
One-click cancel
Once subscribed, the top of the Watchlist and Savings log tabs shows your subscription status. Click Cancel subscription — it takes effect immediately, with no confirmation email and no need to contact us.
Use it until the end of the period
You won’t be charged again, and you keep access until the end of the period you’ve already paid for. The current period isn’t refunded pro rata.
Changed your mind?
Click Resume subscription before the period ends and it renews as usual, with no double charge.
How to update
Update this way and you’ll keep your watchlist, price history, savings log and subscription.
Download the new version and unzip it over the old folder
Copy the new files into your existing
heptapick-extensionfolder, replacing the old ones. Don’t unzip to a new folder and load that — the browser would treat it as a different extension, and your data and subscription wouldn’t carry over.Reload
Open
chrome://extensionsand click the reload button ↻ on Heptapick 七维选品.
Privacy
This is what the extension actually does with your data.
Stays on your computer
Product collection, scoring, your watchlist, price history and savings log all happen and are stored in your own browser. None of it is uploaded.
The only thing sent to our server
To check, cancel or resume your subscription, the extension sends a random device ID created at install. It contains no search terms, products or browsing history. Status is normally checked once every 7 days.
Payment
Handled by Stripe. We only know whether a device ID has an active subscription; we never see your card.
Store accounts
The extension reads pages using the store sessions you’re already signed in to. It never reads, stores or sends your passwords.
FAQ
Which browsers are supported?
Chrome, Edge, Brave, Arc, Vivaldi, Opera and other Chromium browsers. The side panel needs Chrome 114 or later; otherwise a separate window opens. Firefox and Safari aren’t supported yet.
Why Developer mode? Is it safe?
The extension isn’t on the Chrome Web Store yet, and browsers only allow extensions from outside the store through Developer mode. It only accesses the ten stores listed above and our subscription service — you can check its full permissions under “Details” on the extensions page. Once it’s in the store, installing will be one click.
How do I cancel my subscription?
Click “Cancel subscription” at the top of the Watchlist or Savings log tab. It takes effect in one click. You won’t be charged again and you keep access until the end of the current period. Uninstalling the extension also opens a cancellation page automatically.
Do I get a refund when I cancel?
The current period isn’t refunded pro rata, but you keep access for the rest of it and won’t be charged again.
Why an extension instead of a website?
Stores block automated requests from servers; prices are only readable in a real browser. Running in your own browser also keeps your logins, so you see member prices and prices for your shipping address.
I searched and got no results. What now?
Check that you picked the right country, that the stores open normally on your network, and that a store isn’t asking you to sign in or complete a check. Sometimes a store redesign makes one site temporarily unreadable; results from the others aren’t affected.
I paid but my subscription isn’t active.
Go back to the Watchlist or Savings log tab and click “Check again”. If you paid somewhere other than the button in the extension, we can’t tell which device it was for, so it won’t activate automatically.
How are the seven factors scored?
Brand: brand tier, reduced for negative sentiment. Sales: sales rank within the category. Price: price rank within the category — cheaper scores higher. Shipping: delivery speed. After-sales: return window, warranty and service ratings. Reputation: rating quality, lowered when there are too few reviews. Value: quality signals divided by price, ranked within the category. Factors a store doesn’t publish are left out.