Margin Radar Privacy Policy

Last updated November 8, 2026

Margin Radar is a family of browser extensions for marketplace sellers. Each one works on a single marketplace: Amazon, TikTok Shop, Etsy, eBay, Walmart, Shopee, Mercado Livre, Allegro, Ozon or Wildberries. This policy covers all of them and explains what they read, what they keep and what leaves your device.

What Margin Radar reads

The product page you have open on its marketplace: product title, price, list price, shipping, category and similar details the page shows. It reads these only on that one marketplace, to calculate profit, margin, ROI and fees.

What Margin Radar keeps

The costs and settings you enter, calculations you save, a daily usage count and your plan status, including your license key if you buy Pro. All of this stays in your browser's local extension storage on your device. The developer has no access to it.

What leaves your device

Only your license key, if you enter one. Margin Radar sends it to Polar (api.polar.sh), the payment provider, to check that your Pro subscription is active. Nothing else is sent anywhere. There are no accounts, analytics or trackers, and all calculations run on your device.

Payments

Pro subscriptions are sold by Polar Software, Inc., which acts as Merchant of Record: it processes the payment, handles sales tax and VAT, and sends your receipt and license key. Margin Radar never sees your card or bank details. Polar's own privacy policy applies to the data you give it at checkout: polar.sh/legal/privacy.

What Margin Radar never does

It doesn't sell or share your data. It doesn't use your data for advertising, credit decisions or anything unrelated to its purpose. It doesn't run remote code. It never buys, lists or changes anything on the marketplace.

Your control

You can export your saved calculations to CSV and delete them in the extension. Removing the extension deletes everything it stored in your browser.

Changes and contact

If this policy changes, the date above will change too. Questions: a@pr.tools

Margin Radar is an independent tool, not affiliated with or endorsed by any of the marketplaces named above.