# A/B Testing Calculator — Sample size & significance

> Sample size & significance (iPhone/iPad app by Mindbox, LLC.)

- Source: https://appshunter.io/ios/app/ab-testing-calculator/id6748603891 (this page in markdown: same URL + `.md`)
- Developer: [Mindbox, LLC](https://appshunter.io/developer/1830224290)
- Category: Business, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: American English, Russian
- Released: 2026-06-23
- Data updated: 2026-08-11
- User reviews in markdown: https://appshunter.io/ios/app/ab-testing-calculator/id6748603891/reviews.md

## What is A/B Testing Calculator?

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.


## Version history (last 4 releases)

### 1.5 — 2026-07-14

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.

### 1.4 — 2026-06-24

Redesigned results screen. After your test, each variant now appears as its own card — with a copyable confidence interval, a clear comparison to the control, and a visual interval bar — so the significant winner is easy to spot at a glance.

Refreshed input fields and small polish throughout.

### 1.3 — 2026-06-23

No release notes.

### 1.2 — 2025-08-01

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-11.*