Short version: the numbers you type into our calculators never leave your device.
Last updated: 13 November 2026
The calculators on this site run entirely in your browser using JavaScript. The figures you enter — prices, costs, fees, return rates, measurements — are processed on your own device. They are not transmitted to us, not stored on a server, and not linked to you in any way. There is no account, no signup and no email requirement.
Like almost every website, our hosting provider keeps standard server logs — the page requested, the time, the browser type and the IP address. These exist for security and troubleshooting, and are retained according to the host's policy. We do not use them to build profiles of individual visitors.
We do not set advertising or tracking cookies, and we do not use a cookie banner because there is nothing to consent to. Your browser may store the pages in its cache; that stays on your device.
We do not sell, rent or share personal data with anyone, because we do not hold any.
This site currently uses no analytics tool. If we add one later, this page will say which tool, what it measures, and how to opt out, before it goes live.
These tools are intended for adults running or planning a business. We do not knowingly collect information from anyone under 18.
Because we do not store personal data from the calculators, there is usually nothing to access, correct or delete. If you have emailed or messaged us, you can ask us to delete that correspondence at any time and we will.
If this policy changes, the date at the top of the page changes with it. Material changes will be noted on the homepage.
Questions about privacy: hello@sellersuccesslab.com (replace with your own address).