Email: contact@abfinal.com
We read everything and usually reply within a few working days.
Good reasons to write
- You found an error in a formula, a number or a fact. Tell us the page and what you expected; we'll check it against references and fix it.
- A calculator misbehaves in your browser. Include the browser, device and the inputs you used.
- You have a suggestion for a calculator or guide that would help people running tests.
What we can't help with
- Accounts, billing or data from the old "AB Final" Shopify app that used to live on this domain. That was a different business. Check the apps section of your Shopify admin for subscriptions.
- Running or setting up tests on your store. ABFinal provides calculators and guides only.
- Paid placements, link exchanges or sponsored posts. We don't accept them.
Please don't send personal data or confidential test results you're not allowed to share. If you want help interpreting numbers, rounded figures are fine.