FeeStackBase

Privacy

Last updated: July 19, 2026

FeeStackBase is built so the fee math can finish without sending your sale prices to our servers. You type numbers; the browser (and a Web Worker when available) computes the stack. Close the tab and those inputs are gone from the page — we do not store them as a seller ledger.

What stays on your device

  • Sale prices, shipping, category overrides, COGS, fulfillment stubs, and other calculator fields
  • Fee stack results computed in the browser
  • Optional theme preference may live in localStorage on your device only

Accounts

There are none. No sign-up, no saved inventory list on our servers, and no mailing-list wall before the calculators work.

Analytics

We use Google Analytics 4 (measurement ID G-27SBQR8F98) to understand aggregate traffic — pages viewed, approximate country/region, device type, browser, and referral source. IP addresses are anonymized. Analytics is not linked to calculator inputs or any account (we do not have accounts). Using the fee tools does not require analytics.

Consent Mode defaults: analytics_storage granted for measurement; ad_storage, ad_user_data, and ad_personalization denied while advertising is off. Config also disables Google signals for this property. GA4 may set cookies such as _ga for session measurement.

Google's privacy policy: policies.google.com/privacy. Opt out with Google's Analytics Opt-out Browser Add-on.

Ads

Display ads are not enabled today. If ads are turned on later, third-party ad networks may set cookies per their policies — this page will be updated. Calculator inputs still stay local to the math. Ad personalization is not required for the fee stack to work.

What may leave the device

  • Email you send us voluntarily if you contact support
  • Aggregate Google Analytics 4 traffic data (not calculator inputs) — see above
  • Normal host security logs (IP, user agent, path, timestamp) for abuse prevention — not used to rebuild your fee inputs

Email

If you write us, we receive whatever you put in the message (URL, inputs, screenshots). We use that to fix bugs or answer the question — not to build a marketing list from your fee scenarios.

Contact

Privacy questions: contact@feestackbase.com or the contact page. How rates are chosen: methodology. Acceptable use: terms.