Terms of use

Effective 2026-10-19. These terms are between you and Norwell Systems LLC for the FeeLens browser extension and this website.

The license

A paid license is per person. The person named on the purchase may use their key on any number of their own browsers. Sharing a key with another person is not allowed. The 7-day trial is free and needs no key.

Payment, renewal and refunds

Subscriptions are sold by Polar Software Inc. as merchant of record and renew monthly or yearly until cancelled. Cancel from the receipt email or the Polar purchases page; access continues to the end of the paid period. Ask for a refund within 14 days of any charge and we will issue it.

Estimates, not advice

FeeLens applies fee tables that Amazon publishes and that we compile by hand with a visible date. Amazon changes fees, adds surcharges and bills on the weight and size it measures. The numbers FeeLens shows are estimates to help you think; they are not a guarantee of any fee, profit or outcome and are not financial advice. Check your own seller account before you order inventory.

Acceptable use

Use the extension on your own browser for your own research. Do not reverse the license check, resell keys, or use the software to break Amazon's terms.

Availability and changes

We may change the extension, the fee tables and these terms. Material changes to the terms are announced on this page with a new effective date. We may stop offering the product with 30 days' notice; paid periods are refunded pro rata if that happens.

Liability

To the extent the law allows, Norwell Systems LLC is not liable for indirect or consequential losses, lost profit, or inventory decisions made with the extension. Our total liability for any claim is limited to the amount you paid us in the twelve months before the claim.

Governing law

These terms are governed by the laws of the State of New Jersey and of the United States, without regard to conflict-of-law rules.

Contact

Norwell Systems LLC, stack@norwellsystems.com.

FeeLens is not affiliated with Amazon.com, Inc.