A/B testing · Honest statistics

A/B tests thatdon’t lie to you.

Most dashboards call a winner the moment the numbers wiggle. Echo plans each test before it starts, waits for enough data, and reads it once. When it says B won, B won.

Free scan. No account.Try it below

Echo · A/B testing

  1. 1Plan itEcho sizes the test from your real traffic: how many visitors, how many orders, how many days.
  2. 2Run itHalf your visitors see each version. Same days, same ads, same weather. No flicker.
  3. 3Read it onceAt the end of the window, Echo reports the chance each version is better, and ships the winner when you say so.

Don’t read about it. Try it.

These run the real Wavelynks code, right here in your browser.

01

Why peeking lies

Two identical pages. Same true conversion rate. Watch a typical dashboard crown a winner anyway.

02

A planned window, read once

The real Wavelynks stats engine. Watch a test play out and the verdict arrive at the end, not halfway.

03

Know before you launch

Is this page busy enough to test? Echo checks your real traffic first and tells you straight.

04

No flicker

Visitors never see the old page flash before the new one.

How it works.

  1. 1

    Plan it

    Echo sizes the test from your real traffic: how many visitors, how many orders, how many days.

  2. 2

    Run it

    Half your visitors see each version. Same days, same ads, same weather. No flicker.

  3. 3

    Read it once

    At the end of the window, Echo reports the chance each version is better, and ships the winner when you say so.

The details. All of them.

Chance to beat, in plain words

Not p-values. “B has a 96% chance of selling more than A” is a sentence anyone can act on.

A planned window

Tests end when they planned to, not when a chart looks exciting. That’s how you avoid fake winners.

Too quiet? It says so

If a page can’t reach a result in six weeks, Echo tells you before you waste them.

Stops clear losers early

If every variant is clearly worse, Echo pauses the test instead of letting it cost you sales.

Ship per device

A variant that only wins on phones can go live on phones only.

Every result filed

Winners and losers go into Learnings, so nothing gets tested twice.

Questions.

Enough for a few hundred visitors and roughly 50 orders per variant within six weeks. Echo checks your real traffic before launch and tells you if a page is too quiet.

Goes well with.

Everything Wavelynks does

Quit guessing.
Start knowing.

Paste your URL. In about a minute you’ll know where your store loses sales. Worst case, it’s perfect. (It isn’t.)