# Power Analysis — Easy guided statistical tests

> Guided statistical testing for experiment design and data analysis. (iPhone/iPad app by A&X Analytics, LLC.)

- Source: https://appshunter.io/ios/app/power-analysis/id441831752 (this page in markdown: same URL + `.md`)
- Developer: [A&X Analytics, LLC](https://appshunter.io/developer/436525441)
- Category: Productivity, Medical
- Price: $4.99
- Rating: 5.00/5 from 3 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 3 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2011-06-10
- Data updated: 2026-08-07
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/power-analysis/id441831752/reviews.md

## What is Power Analysis?

Design experiments and measurements confidently with minimal knowledge of statistics.

Have you ever worried if the study you were planning would have enough data to conclude anything?

Know how much data you need while you're still in the planning phase. Let the app do the statistics for you.

• Easy to use interface helps you enter the pertinent information without being a statistics expert.
• Know how many observations you'll need to measure what you want.
• Know how good a measurement you'll get for any number of observations you set.
• Visualizations
• Play with sliders for key parameters and see how they affect the measurement
• Supports measurements of rates and proportions (binomial distributions) in addition to continuous distributions
• Chooses appropriate statistical test for you based on your experimental parameters. (Tests include t, z, chi square, and exact binomial).
• Set your preferred risk of both false positives and false negatives (type I error and type II error)

Can also be useful as an interactive study tool for learning about the statistics of measurement

## Key features

- Guided experiment design
- Sample size determination
- Measurement quality assessment
- Support for various distributions
- Automatic statistical test selection
- Interactive parameter adjustment

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/power-analysis/id441831752/reviews.md

### 1/5 — 功能太差，只值一块钱的软件。

*2016-11-03*

功能太差，只值一块钱的软件。

### 1/5 — 垃圾

*2015-11-11*

肠子都悔青了，垃圾中的战斗机。

### 1/5 — 垃圾

*2014-08-08*

没什么用

### 1/5 — 不能用

*2013-09-22*

花了钱，老是闪退,一次没用上。能不能把钱还给我。

### 5/5 — Fantastic tool

*2012-06-23*

I have worked as a statistician for 44 years, and taught statistics for many years. Power and sample size are difficult concepts for non-statisticians and I had the idea of a dynamic graphical exposition  about maybe 20 years ago, and it was something I wanted to do. Needless to say I never got around to it, and in any case I did not have programming skills to do it.  So I just want to say "congratulations" on a great app. It is exactly what I had envisaged a long time ago. The graphics are excellent and i am sure this will be a great tool for teachers and researchers.

### 5/5 — Excellent

*2012-04-24*

intuitive interface, great for planning the basics or teaching

### 5/5 — Very helpful app

*2012-01-09*

Very helpful app for my experiment design

### 4/5 — MD

*2011-06-12*

App now working and provides the support as stated, good work.

## Frequently asked questions about Power Analysis

### What is Power Analysis used for?

Power Analysis helps you design experiments and measurements by determining the necessary sample size and understanding the quality of your measurements. It guides you through the statistical aspects of study planning.

### How does Power Analysis help with experiment design?

It provides an easy-to-use interface to enter experimental parameters, helping you understand how much data you need to achieve meaningful conclusions and how good your measurements will be for a given number of observations.

### What statistical tests does Power Analysis support?

Power Analysis automatically chooses appropriate statistical tests based on your experimental parameters. Supported tests include t, z, chi square, and exact binomial tests.

### Can Power Analysis be used for learning statistics?

Yes, it can serve as an interactive study tool for learning about the statistics of measurement. You can adjust key parameters with sliders to see their effects.

### What types of measurements does Power Analysis support?

It supports measurements of rates and proportions (binomial distributions) in addition to continuous distributions, offering flexibility for various experimental needs.

### What is the price of Power Analysis?

Power Analysis is a paid application priced at $4.99.

### On which devices can I use Power Analysis?

Power Analysis is available for iPhone, iPad, and iPod devices.

### How often is Power Analysis updated?

The latest version was released on August 1, 2018, indicating it has not been updated recently. The current version is 2.0.1.

## Version history (last 5 releases)

### 2.0.1 — 2018-08-01

This update from Apple will improve the functionality of this app. No new features are included.

• Fixes for user reported issues

### 2.0.0 — 2015-12-10

• Updated for iOS 9 including Slide Over and Split View. Check significance without leaving the article you are reading!
• Updated appearance
• New UI flow lets you choose if you want a sample size calculation or to evaluate a test and acts accordingly
• Allow separate standard deviations for two sample case

### 1.4.0 — 2013-09-24

• Updated for iOS 7 compatibility

### 1.3.1 — 2012-11-02

• Updated for iOS6
• Updated for iPhone 5

### 1.3.0 — 2012-07-12

• Added option for one-tail tests. Default remains two-tail.

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## More apps by A&X Analytics, LLC

- [Data Explorer](https://appshunter.io/ios/app/data-explorer/id466656828)

All apps by A&X Analytics, LLC: https://appshunter.io/developer/436525441

## Related topics

[reliability analysis](https://appshunter.io/ios/topics/reliability-analysis)

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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 2026-08-07.*