Compare prices, reviews and deals for the same product across Amazon, Walmart, Best Buy and eBay — plus 9 major Vietnamese stores. Powered by Chrome's built-in AI (Gemini Nano): no API keys, and your data never leaves your computer.
Works in Chrome 138+ on desktop. AI features need a one-time ~2 GB model download; price comparison works without it.
AmazonWalmartBest BuyeBay+ 9 Vietnamese stores
Real screenshot, taken with the Vietnamese store set. The interface is also available in English.
See it on a real Amazon page
The card on the product page compares the same model at Walmart, Best Buy and eBay; one more click opens the full comparison and the on-device AI verdict.
Real screen recording in Chrome, 27 Sep 2026 (Amazon US, delivery to ZIP 10001). Waiting is sped up where labelled; prices are as of that day.
Everything you need before clicking “Buy”
Type a product name, or open any product page and click the floating “Find a better price” button.
AI-powered verdicts
Best overall, best price, best reviewed, best selling and best after-sales — with a plain-language verdict, pros, cons and buying tips generated on your device.
Real store promotions
Free shipping, fast delivery, bank and instalment offers — read straight from each store and shown on every listing.
Fake deal alerts
Suspiciously cheap listings are flagged, not hidden. Refurbished, used and open-box items are labelled and never picked as “best price” over a new one.
One-click compare from any product page
On a supported store, a small card offers to compare the product at the other stores. One click and the results open in the side panel — nothing is searched until you ask.
Coupon wallet
Promo codes you come across on store pages are remembered and can be tried at that store's checkout in one click. It only fills in the code — it never places an order.
Price history for saved items
Save products and see how their price moves. The price is recorded each time you revisit a saved product's page — nothing runs behind your back.
Private by design. Powered by local AI.
The AI is Gemini Nano, built into Chrome, running 100% on your device. Your searches go straight from your browser to the stores — exactly like searching there yourself. Everything except the AI verdict works even without Gemini Nano.
No server, no account, no analytics — not even on this page.
Nothing is searched and no background tab is opened until you click.
Affiliate links are off by default. If you turn them on, every place a tagged link can be clicked says so, and the price you pay does not change.
It never rewrites links on store pages and never replaces someone else's referral code.
Support
Found a bug, a store that returns nothing, or want another store added? Open an issue on GitHub Issues. In the extension, a failing store chip has a Copy diagnostics button — pasting that into the issue helps a lot.
