🦉 Owl/Bee (A/B) Test Calculator 🐝

From pre-test planning to post-test analysis with Frequentist and Bayesian methods.

1. Enter Test Data & Settings

Load Sample Data

Input the user counts, conversions, and statistical settings for your test.

Analysis Settings

2. Analyze Results

Frequentist & Bayesian Summary

Variant
Prob. to be Best
Confidence
More Days Needed

Minimum Detectable Effect (MDE)

Please enter the "Days Test Has Run" to calculate MDE projections over time.
Duration
MDE
Duration
MDE

Bayesian Posterior Distributions

This chart shows the probability distribution of the true conversion rate for each variant. Taller, narrower peaks indicate more certainty.

This chart shows the probability distribution of the true Revenue Per User (RPU) for each variant. Taller, narrower peaks indicate more certainty.

✨ AI Insights

Use AI to generate a hypothesis, interpret results, or get page improvement ideas.

To use AI features, you need a Google AI API key. Get a key here.

Interpret Results

Get a business-friendly summary of your test results.

Generate Hypothesis

Describe the change you are testing:

Analyze Page Screenshot

Upload a screenshot to get AI-powered improvement suggestions.