# Statistics Calculator+++ — Probability Distributions

> Scientific calculator for statistical analysis, regression, and probability distributions. (iPhone/iPad app by Dogahe.)

- Source: https://appshunter.io/ios/app/statistics-calculator-plus-plus-plus/id568120619 (this page in markdown: same URL + `.md`)
- Developer: [Dogahe](https://appshunter.io/developer/468657946)
- Category: Utilities, Finance
- Price: $2.99
- Rating: 4.30/5 from 46 App Store ratings · 15 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 4 MB
- Languages: English
- Released: 2012-11-21
- Data updated: 2026-06-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/statistics-calculator-plus-plus-plus/id568120619/reviews.md

## What is Statistics Calculator+++?

Statistics Calculator+++ is a  scientific calculator with statistical, regression analysis, probability distributions, confidence intervals, and hypothesis tests capabilities. 
 
In designing the statistics functions of this app we had one thing in mind: The user should not need to read a single line of manual to perform the statistical analysis. 

Simply use Add X, Add Y, and Add f buttons to enter the elements of the lists and frequencies, if any, and you are done. All the statistics and regression models are only a few taps and swipes away. Tap the List button to see the lists entered. The elements of the lists are interpreted independently (as two separate lists) and jointly for regression analysis (if the size of the lists are equal). You can also take advantage of a new import feature to bring in your data from Microsoft Excel or Apple Numbers by first converting them into .csv format.

Statistics measure and plots:
- Sum, mean, population standard deviation, sample standard deviation, sample variance, sum of squares, min, max, quartiles, and sum of multiplications of two lists are . 
- Box and whiskers plot, histogram of the data, linear, area, scatter plot, and moving average.

Regression:
- Linear, logarithmic, exponential, power, and quadratic regressions. An extremely simple and intuitive user interface to choose the regression model and calculate predictions for x and y values and view residuals and residual sum of squares. It also graphs the regression model and how it fits around the data entered.

You have the capability to save multiple lists of data and use any of them as list X, list Y, or list f. Access Lists Editor feature by tapping the icon on top right of the Statistics Lists view. Furthermore, all these lists persist in the memory. Therefore, if you close and the relaunch the app the lists are there for you.

Normal distribution functionality of TI-83/TI-84 (normalpdf, normalcdf, invNorm, ShadeNorm),  Student's t-distribution (tpdf, tcdf, invT), Chi-Squared distribution, F distribution, Binomial distribution (binompdf, binomcdf), Poisson distribution (poissonpdf, poissoncdf), and Geometric distribution (geometpdf, geometcdf) are all possible with this app with an easy to use, and beautiful user interface. In addition you have Beta and Gamma Distributions.

Confidence interval calculation and step by step explanation for "One Population Proportion", "Difference in Two Population Proportions", "Population Mean", and "Difference in Population Means".

Hypothesis test for "Population Proportion", "Difference in Two Population Proportions", "Population Mean" and "Population Mean Difference" with known and unknown population standard deviations.

Other major features of Statistics Calculator+++ are:
- The left pane scrolls to reveal more functionality without a need to switch modes.
- You see the expression as you enter and it keeps a history of your calculations 
- Capability of performing fraction manipulations and converting between different formats (proper, improper, and mixed fractions) and seamless integration of fraction, integer, and decimal manipulations.
- Capability of inputting degrees, minutes, and seconds for angles and converting between degrees-minutes-seconds format and decimal format.
- Capability of calculating permutation, combination, Least Common Multiple (LCM), Greatest Common Divisor (GCD), and prime factorization.
- Quadratic and system of two linear equations solver
- Rectangular to polar and polar to rectangular coordinate conversion (extremely useful for phasor calculations for electrical engineers)
- Throws a set of dice (choice of 1 die to 4 dice)
- Backspace to delete last digit entered.

This is an ongoing project and we are working on more features and functions to be added to every update of the app.

You are going to love the simplicity of the user interface and yet have the powerful functionality with which Statistics Calculator+++ is loaded.

## Key features

- Statistical calculations
- Regression analysis
- Probability distributions
- Confidence intervals
- Hypothesis tests
- Data visualization plots
- Import data from CSV

## Recent user reviews (10 of 15)

All indexed reviews: https://appshunter.io/ios/app/statistics-calculator-plus-plus-plus/id568120619/reviews.md

### 5/5 — Good deal

*2023-10-17*

This is an affordable way to get a great calculator! I have both the iOS and iPadOS versions. I like how he has adapted the calculator for iPad.

### 5/5 — Great

*2020-01-31*

Couldn’t be happier with a statistics calculator. Does all I need and more.

### 5/5 — The manual on the website is really clear!

*2015-09-02*

I started messing around with all of the different functions, and the manual on the developers website was a great way to do this. Not sure if some of the other commenters here made the effort to go online, so definitely take a look.

The developers are pretty responsive with any issues too.

### 1/5 — Where are the statistics?

*2014-11-28*

I assume somewhere on this there are statistical functions, however I don't see them and have been unable to figure out how to find them. How do I get my $1.99 back.

**Developer response:** This app is all about statistics and we didn’t try to hide those features. We hope that you found them. If not please let us know calc@dogahe.com

### 1/5 — No manual = no good

*2014-10-19*

It is statistically impossible to be able to figure this app out without a manual.

### 4/5 — N-1

*2014-07-23*

It's a fine buy, but for class, my instructor teaches the standard deviation with n-1 instead of just n. It would be helpful to have that feature.

**Developer response:** Thanks for your feedback. Wouldn't what you are looking for be what we call sample standard deviation in this app which uses (n-1) as opposed to population standard deviation which uses n?

### 1/5 — Simply Does not Work

*2014-05-19*

It's very simple:  try using, e.g., nPr function. How do you use it?  I assume this is permutations.  But what key do you press first?  5 or the function key?  How do you clear the register so you can enter a new problem?  I would think by hitting "C" or "MC" or something logical like that.   Oh, perhaps the problem is that I don't know how to use it?  Where is the manual?  Can't find it on the web site. And, IT CRASHES.

**Developer response:** To find the permutation of 2 out of 5, you will press 5 nPr 2 =
You clear the calculator by pressing AC. C will delete only the last number in the calculation. This is not an RPN calculator, so there is no concept of register. Please let us know how you were able to make the calculator crash?

### 4/5 — Thanks, but.

*2014-04-10*

I like it, but could you put variations as well.

**Developer response:** Thanks for your feedback. Could you please elaborate on what you mean by "variations"?

### 5/5 — So helpful

*2014-01-17*

Very helpful statistics calculator. Just plug in the numbers and all you need is right there and if you wanna get more advanced and see the regression models and do interpolation, a few button presses and swipes will do the trick. The results are also very accurate, never had seen any problems with this app. Thanks developers.

### 5/5 — not bad

*2013-11-10, version 1.07*

Needed a statistic app to compute z scores, standard deviations, and other parameters, and this did the job quite well. It automatically computes these parameters for any given set of scores, is easy to use, and has an attractive layout.

## Frequently asked questions about Statistics Calculator+++

### What statistical functions does Statistics Calculator+++ offer?

Statistics Calculator+++ provides a wide range of functions including sum, mean, standard deviation, variance, min, max, quartiles, and sum of squares. It also supports various regression models like linear, logarithmic, exponential, power, and quadratic.

### Can I import data into Statistics Calculator+++?

Yes, you can import your data into Statistics Calculator+++ by converting your spreadsheets from Microsoft Excel or Apple Numbers into .csv format and then using the import feature.

### Does Statistics Calculator+++ support probability distributions?

Yes, it supports Normal, Student's t, Chi-Squared, F, Binomial, Poisson, Geometric, Beta, and Gamma distributions, mirroring functionality found in calculators like the TI-83/TI-84.

### How does Statistics Calculator+++ handle confidence intervals and hypothesis tests?

The app offers step-by-step explanations for calculating confidence intervals for proportions and means, as well as performing hypothesis tests for population proportions and means.

### Is Statistics Calculator+++ easy to use without a manual?

The app is designed for intuitive use, allowing users to perform statistical analysis with minimal instruction. Data entry is straightforward using 'Add X', 'Add Y', and 'Add f' buttons.

### What is the price of Statistics Calculator+++?

Statistics Calculator+++ is a paid application, available for a one-time purchase of $0.99.

### How often is Statistics Calculator+++ updated?

The app was last updated on April 24, 2023, indicating regular maintenance and potential feature additions. Its latest version is 1.17.

### What devices is Statistics Calculator+++ compatible with?

Statistics Calculator+++ is currently supported on iPad devices, offering its full suite of statistical tools on a tablet interface.

## Version history (last 5 releases)

### 1.18 — 2026-06-17

Bug fixes.

### 1.17 — 2023-04-24

We added support for both portrait and landscape orientations. Furthermore, you can use this on iPad's split views.

### 1.16 — 2023-02-21

- Added gamma distribution to the list of other distributions.
- History of calculations persist through relaunch of the application. 
- New plots: linear, area, scatter plot, and moving average.

### 1.15 — 2023-01-08

Added more support for light and dark mode in all the screens.

### 1.14 — 2023-01-05

Better color options for light and dark modes.

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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 2026-06-22.*