Included, free
| What | Notes |
|---|---|
| Sample size calculator | Two-sided or one-sided, any number of groups, optional Bonferroni correction |
| Significance calculator | z-test, chi-square, confidence intervals, exact Bayesian probability to beat |
| Test duration and MDE | Plan around your real traffic |
| SRM checker | Up to eight groups, any split |
| Price test calculator | Revenue and profit per visitor, break-even conversion |
| A/A simulator | See the cost of peeking |
| X post tools | Post comparer and variant planner |
| Guides and blog | Every article, no email gate |
No account, no trial, no credit card, no usage limits.
Not included, on purpose
ABFinal doesn't run experiments. It doesn't split traffic, edit your pages, install a script on your store or connect to Shopify, Google, Meta or X. For that you need a testing platform or your own setup. Our comparison pages explain the main options honestly: Optimizely, VWO, AB Tasty, Intellimize and Mutiny.
It also doesn't collect data. There are no accounts to store results in and no analytics on the site. If you want to keep results, use the copy buttons or note the numbers.
How the site pays its way
It's a small, static site with tiny hosting costs. There are no ads, no affiliate links and no sponsored placements. Comparison pages aren't paid for by the vendors they cover.
A note on the old app
This domain used to host a paid Shopify A/B testing app with a different team. That product isn't connected to ABFinal today, and we can't access accounts, subscriptions or data from it. For billing questions about an old Shopify app subscription, check the apps section of your Shopify admin.
Common questions
Will ABFinal start charging later?
The calculators and guides are meant to stay free. If we ever add something paid, the existing tools won't move behind it.
Is there a limit on how many calculations I can run?
No. The calculations happen on your device, so there's nothing to meter.
Can I use ABFinal for client work?
Yes. Use the calculators for your own business or for clients. You don't need to credit us, though a link is welcome.
Do you offer an API?
No. The math is in one readable JavaScript file that any page on the site loads, and the formulas are documented on the methodology page if you want to reimplement them.