# Art of Stat: Inference — Confidence Intervals and Tests

> Statistical calculator for confidence intervals and hypothesis tests on proportions and means. (iPhone/iPad app by Bernhard Klingenberg.)

- Source: https://appshunter.io/ios/app/art-of-stat-inference/id1578438712 (this page in markdown: same URL + `.md`)
- Developer: [Bernhard Klingenberg](https://appshunter.io/developer/1564877195)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 20 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 33 MB
- Languages: American English
- Released: 2021-08-27
- Data updated: 2026-06-03
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/art-of-stat-inference/id1578438712/reviews.md

## What is Art of Stat?

**********
News: The Inference app is now part of the all new "Art of Stat" app, a single app that contains Inference and seven other modules (Explore Data, Distributions, Concepts, Regression, Machine Learning, Resampling and Data Editor)



Please consider getting the Art of Stat app for the latest updates and features from the App Store. Simply search for "Ar of Stat" on the App Store. This app will continue to work, but future development is concentrated on the new Art of Stat app.

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Statistical calculator for inference (confidence intervals and hypothesis tests) about proportions and means.

The Art of Stat: Inference app provides:

- Inference for Proportions
   + one sample (z-test)
   + two independent samples (two sample z-test)
   + two dependent samples (McNemar)

- Inference for Means
   + one sample (t-test)
   + two independent samples (two-sample t-test)
   + two dependent samples (paired t-test)
   + several means (One-way ANOVA)

- Chi-Square Test
   + Goodness of Fit (one sample)   
   + Independence/Homogeneity (contingency table)

- Data Editor
   + Create or edit datasets

Unlock all modules for a one-time small fee!

Entering your own data is easy:
If you just have a few observations (or if you have the summary statistics), simply type them in. For larger datasets, upload a CSV file of your raw data to a cloud account (such as iCloud or Google Drive) or email the file to yourself and save it on your device. Then, open the CSV file in the app and select the variables for your analysis. You can also simply copy & paste raw data from a spreadsheet app (such as Numbers on iOS or Google sheets).

To illustrate all methods, several example datasets are provided for each procedure.

The results are stunning:
The app provides relevant plots (side-by-side or stacked bar charts, boxplots, histograms) and computes and visualizes confidence intervals and P-values for testing hypotheses. All relevant information (such as standard errors, margin of errors, z- or t-scores and degrees of freedom) are clearly displayed and labeled. The P-value is visualized on a graph for the normal, t-, Chi-Squared or F-distribution.

Developed for both students and teachers as a handy tool for carrying out basic statistical inference and visualize results on the fly. 

The app works in on- and offline mode (the app indicates that it is in offline mode with a large green banner), which makes it suitable for exams.

Easily share your results by taking screenshots.

## Key features

- Inference for proportions (z-test, two sample z-test, McNemar)
- Inference for means (t-test, two-sample t-test, paired t-test, ANOVA)
- Chi-Square tests (Goodness of Fit, Independence)
- Data editor for creating, editing, and importing datasets
- Visualizations of confidence intervals and P-values
- Offline mode for exam use
- Result sharing via screenshots

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Inference for a Mean | $0.99 | one-time |
| Coverage for Intervals | $0.99 | one-time |
| Errors & Power | $0.99 | one-time |
| Inference for Two Proportions | $0.99 | one-time |
| Inference for Two Means | $0.99 | one-time |
| ANOVA: Comparing Means | $0.99 | one-time |
| Chi-Square Test (Independence) | $0.99 | one-time |
| Two Quantitative Variables | $0.99 | one-time |
| Chi-Square Test (GoF) | $0.99 | one-time |
| Unlock All Apps | $3.99 | one-time |
| Two Dependent Means | $0.99 | one-time |
| Two Dependent Proportions | $0.99 | one-time |


## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/art-of-stat-inference/id1578438712/reviews.md

### 5/5 — Great for my intro stats class

*2023-04-03, version 1.5.0*

This covers all the methods we learn in Stat 101, and is so easy. Our teacher even uses it in class to demonstrate a new analysis, and we can follow along on our phones. No more tables to look up to find P values, or what test statistic to use. Incredible easy!

### 4/5 — Great Basic app

*2022-11-17, version 1.4.0*

I wish the one mean app would round at least one decimal instead of rounding the margin of error to a whole number. Students can’t use the app on their homework.

### 5/5 — Great

*2021-12-11, version 1.1.0*

Great app 
Helps my stats students. Easy to use. Fun as well. One of the best things that the net as produced.

## Frequently asked questions about Art of Stat

### What statistical tests does Art of Stat: Inference offer?

Art of Stat: Inference provides a range of tests for proportions and means, including one-sample and two-sample z-tests, McNemar's test, one-sample and two-sample t-tests, paired t-tests, and One-way ANOVA. It also includes Chi-Square tests for Goodness of Fit and Independence.

### How can I input data into Art of Stat: Inference?

You can easily enter your own data by typing in observations or summary statistics. For larger datasets, you can upload CSV files from cloud storage like iCloud or Google Drive, email them to yourself, or copy and paste data directly from spreadsheet applications.

### Does Art of Stat: Inference work offline?

Yes, the app is designed to work in offline mode, indicated by a large green banner. This feature makes it suitable for use during exams where internet connectivity may not be available.

### What kind of visualizations does Art of Stat: Inference provide?

The app generates relevant plots such as bar charts, boxplots, and histograms. It also clearly displays and labels computed confidence intervals, P-values, standard errors, margin of errors, and test statistics, visualizing the P-value on distribution graphs.

### Is Art of Stat: Inference suitable for students and teachers?

Yes, the app is specifically developed for both students and teachers as a handy tool for performing basic statistical inference and visualizing results on the fly. It aims to simplify complex statistical procedures.

### How can I share my results from Art of Stat: Inference?

You can easily share your analysis results by taking screenshots of the generated plots and statistical outputs. This allows for quick sharing of findings with others or for inclusion in reports.

### What is the pricing for Art of Stat: Inference?

The app is available for free. However, to unlock all modules and features, there is a one-time small fee required through in-app purchases.

### Is Art of Stat: Inference updated regularly?

The developer notes that future development is concentrated on a new, consolidated 'Art of Stat' app. While this app will continue to function, users seeking the latest updates and features are encouraged to explore the new application.

## Version history (last 5 releases)

### 3.0.0 — 2026-02-13

- Legacy Version: Continuous to work, but I recommend upgrading to the new "Art of Stat" app, which contains this and 7 other modules for one powerful app.
- Search for "Art of Stat" in the App Store.

### 2.1.0 — 2025-09-01

- Upload files from Google Drive
- Load data faster

### 2.0.0 — 2024-12-10

Methods for Two Dependent Samples:
 + Paired t-test for comparing two means
 + Mc Nemar's test for comparing two proportions

### 1.9.0 — 2024-11-02

- better supports landscape mode on tablets

### 1.6.0 — 2023-09-26

- Data Editor for creating or manipulating data
- Use population standard deviation for inference about mean
- Color dots by third categorical/quantitative variable

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| [Bayes' Theorem Calculator](https://appshunter.io/ios/app/bayes-theorem-calculator/id1501762787) | 3.0 (1) | $0.99 | Education |
| [Calculator to Find Z-Score](https://appshunter.io/ios/app/calculator-to-find-z-score/id1621102486) | 1.0 (2) | Free | Education |
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## More apps by Bernhard Klingenberg

- [Art of Stat: Distributions](https://appshunter.io/ios/app/art-of-stat-distributions/id1564877193)
- [Art of Stat: Explore Data](https://appshunter.io/ios/app/art-of-stat-explore-data/id1599474757)
- [Art of Stat: Regression](https://appshunter.io/ios/app/art-of-stat-regression/id1613497223)
- [Art of Stat: Concepts](https://appshunter.io/ios/app/art-of-stat-concepts/id6444956478)
- [Art of Stat: Resampling](https://appshunter.io/ios/app/art-of-stat-resampling/id6448982230)

All apps by Bernhard Klingenberg: https://appshunter.io/developer/1564877195

## Related topics

[The earnestness of being important: Reporting non-significant statistical results](https://appshunter.io/ios/topics/the-earnestness-of-being-important-reporting-non-significant-statistical-results) · [art of stat](https://appshunter.io/ios/topics/art-of-stat) · [inferences](https://appshunter.io/ios/topics/inferences)

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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 2026-06-03.*