A browser extension for Amazon sellers (Firefox, Microsoft Edge; the same panel runs on the web page in any browser).

Free, unlimited, no account: on every product page of amazon.com, amazon.de, amazon.es, amazon.co.jp and amazon.com.br it shows Amazon’s own “bought in past month” number as a monthly sales floor, the Best Sellers Rank, the FBA fulfilment fee and referral fee from that store’s 2026 rate card (US holiday peak and 3.5% surcharge, EU rate card of 1 July 2026 with Low-Price FBA, Japan 2026-04-01 table, Brazil table), your profit, margin and ROI after your unit cost, and the listing’s keyword list.

Pro ($14.99 per month or $129 per year): a page-1 market snapshot on every Amazon search (demand and revenue floor, price spread, median reviews, title words, CSV), a sales curve fitted only through the badge floors of products you opened, an unlimited research list with one history row for each day you open a product, the keyword gap against your own listing, CSV and backup.

It reads only the page you open and never loads Amazon pages in the background, so it cannot trigger robot checks. Interface in English, Deutsch, Español, Português and 日本語. Not affiliated with Amazon.