The FBA profit calculator, on every Amazon page.
Install the extension and every Amazon product page gets the full calculator docked beside it: fees, eligibility, offers and price history, signed in as you.
The panel follows you around Amazon.
A panel that rides along while you browse, not another tab to keep open.
Docks or floats
Pin the panel to either side and Amazon shifts over to make room, or let it float and drag it anywhere.
Follows the page
Click through to another product and the panel re-runs on the new ASIN. Search results get a launcher button on every tile.
Reads the listing
The sale price arrives pre-filled from the page you're on. Your cost is the only number left to type.
Same app, signed in
The panel embeds the same signed-in calculator you use at app.stealthseller.co. Same settings, same history, same folders.
Arrange it your way
Reorder the sections, hide the ones you never read, and jump between them from the bar up top. The panel remembers.
Light or dark
Its own theme toggle, independent of Amazon's white. Orange or navy chrome, your pick.
Everything it checks.
Each section of the panel, and what it tells you.
Rank, rating and monthly sold first.
Product, category, rating and ASIN up top; sales rank and monthly sold as graded pills underneath. If the rank is dead, you're done before typing a number.
Muscle Milk Lean Muscle Vanilla Creme Protein Powder, 1.93 Pound (Pack of 1)
Health & Household
Every fee, itemized.
Cost and sale price are the only inputs. Referral, fulfilment, storage, prep and inbound each get their own line, and maximum cost works backwards from your minimum ROI and profit.
Gated or not, before you buy.
One click asks Seller Central whether your account can sell it: sellable, needs approval or restricted, with invoice-gate unit counts when Amazon wants them. Meltable and hazmat flags ride alongside, and the verdict deep-links straight to Sell Yours or the approval application.
Everyone on the listing.
Every seller with their stock, price and the ROI you'd make matching them, buy box holder bolded. Filter to FBA to size up the competition that matters.
| # | Seller | Stock | Price | ROI |
|---|---|---|---|---|
| 1 | AMZ | 24 | $43.98 | 49% |
| 2 | FBA | 11 | $44.49 | 51% |
| 3 | FBM | 6 | $45.20 | 54% |
| 4 | FBM | 2 | $47.85 | 63% |
Buy box share, last 90 days.
Each seller's share of the last 90 days, their average winning price and when they last held it. Amazon at 58% is a different deal than a rotating cast of FBM sellers.
| Seller | Avg. | Won | Last |
|---|---|---|---|
| Amazon | $49.99 | 58% | just now |
| Debby's corner(1.2K) | $44.49 | 27% | 2d ago |
| QuickDeals US(312) | $44.20 | 15% | 9d ago |
| PrimeTime Goods(88) | $45.10 | <1% | 34d ago |
AI search finds your cost.
While you read the listing, the AI searches Walmart, Target and the rest for the same product. Matches come back with a live price sitting next to what it sells for on Amazon.
eBay sales, last 30 days.
Active eBay listings and units sold over the last 30 days, day by day. Quiet stretches fold into a single row, so a drought reads at a glance.
| Date | Sold | Avg price |
|---|---|---|
| Sep 8 | 2 | $24.99 |
| Sep 7 | 1 | $22.50 |
| Sep 4 - Sep 6 | 0 | — |
| Sep 3 | 3 | $23.99 |
| Sep 2 | 1 | $21.00 |
| Aug 28 - Sep 1 | 0 | — |
| Aug 27 | 2 | $24.50 |
The full price history.
Buy box, FBA, FBM and Amazon's own price over time, with sales rank, monthly sold, offer count and rating below. Hover any day for the exact numbers and who held the buy box.
From listing to buy list.
One click files the deal without leaving Amazon. Cost, sale price, fulfilment, your notes and the source URL all travel with it. The folder lives in the web app, where every saved row keeps a live buy box.
Install it in a minute.
Sign in with your Stealth Seller account and open any Amazon listing.