A/B Testing Calculator
Sample size & significance
Free · Designed for iPad. Not verified for macOS.
Plan A/B tests with confidence: find the sample size you need, then check whether your winner is statistically significant — confidence intervals included.
A/B Testing Calculator helps you plan and evaluate A/B tests: work out how many users you need for a reliable result, and find the test winner with statistical significance in mind.
BEFORE THE TEST — SAMPLE SIZE
Set your baseline rate, expected uplift, reliability and power — and the app calculates how many people should see each variant. Works for open rate, click rate and order conversion.
AFTER THE TEST — RESULTS
Enter the number of conversions and the sample size for each variant (up to 5) — the app shows conversion rates, confidence intervals and a clear verdict: which variant is better and whether you can trust the result.
FEATURES
• Two calculators: sample size and results evaluation
• Compare up to 5 variants at once
• Confidence intervals and statistical-significance testing
• Clear explanations without statistical jargon
• Copy any result with one tap
Great for marketers, product managers and analysts.
Ratings & Reviews
Enter conversions as percentages. On the Test results screen, each variant's conversions can now be entered the way your report shows them — as a raw count or as a percentage. Your input stays exactly as typed: change the sample size and the app recalculates the other value, never the one you entered.
Clearer error messages when entering percentages, and small polish throughout.
The developer, Mindbox, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mindbox AM, LLC
- Size
- 3.8 MB
- Category
- Business
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Russian
- Age Rating
4+
- 4+
- Copyright
- © 2026 ООО "Майндбокс"