Update policy

Fee-change notices and fixes are included for 6 months from your purchase.

Fee values in this version were checked against each platform’s official fee page on October 31, 2026. Sources and dates are listed inside the spreadsheet.

If a platform changes a fee, we publish the change in the Fee Changelog and send you the exact values to enter. It takes about two minutes. Notices come through the store you bought from, as a Gumroad or Polar email.

The free Profit Calculator: the 6 months count from the day you confirm your email, and notices are emailed to the address you signed up with.

Bug fixes are free for the same 6 months. New features go into the next edition.

After 6 months your copy keeps working as it is. You can still enter fee changes yourself from the official fee pages; the spreadsheet shows you how.

The next edition, v2.0, is a separate product. As a buyer of the v1.x Profit Tracker or ProfitStamp Pro, you’ll get 30% off it.

Short form

Fees verified as of October 31, 2026. Fee-change notices and fixes are included for 6 months from purchase (from signup for the free Profit Calculator).

ProfitStamp Pro addendum

ProfitStamp Pro ships without its live-show module until the module’s fee rules and import mapping have been checked against a real seller export. When that’s done, every ProfitStamp Pro buyer receives the updated version free, as a new copy link, even after the 6 months.