# Probabilities of Statistical Distributions

> App for calculating probabilities of 17 statistical distributions with dynamic charts and math expressions. (iPhone/iPad app by Thomas Tsopanakis.)

- Source: https://appshunter.io/ios/app/probabilities-of-statistical-distributions/id1165798195 (this page in markdown: same URL + `.md`)
- Developer: [Thomas Tsopanakis](https://appshunter.io/developer/471022214)
- Category: Utilities, Education
- Price: $1.99
- Rating: 4.70/5 from 42 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 6 MB
- Languages: American English
- Released: 2016-11-22
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/probabilities-of-statistical-distributions/id1165798195/reviews.md

## What is Probabilities of Statistical Distributions?

Compute probabilities for 17 statistical distributions

CONTINUOUS
1) Normal / Gaussian
2) Uniform
3) Exponential
4) Gamma
5) Beta
6) Cauchy
7) Weibull
8) Chi-Square
9) F
10) Student's t
11) Log-Normal
12) Laplace

DISCRETE
1) Binomial
2) Negative Binomial
3) Geometric
4) Hypergeometric
5) Poisson

DYNAMIC CHARTS
• Line charts for continuous distributions
• Bar charts for discrete distributions

MATH EXPRESSIONS
Insert any mathematical expression, using common functions (trigonometric, log, ln, sort, etc.), advanced functions (hyperbolic, versine, etc.) and constants (pi, phi, e, etc.) 

FORMULAS HANDBOOK
• Density / mass function
• Mean 
• Variance

MORE FEATURES
• 3 types of probability calculations
• Full offline mode
• Modern, easy-to-use UI
• Universal App
• Best companion app for statistical classes (stats) or any other use

## Key features

- 17 statistical distributions (continuous & discrete)
- Dynamic line and bar charts
- Insert mathematical expressions
- Formulas handbook (density, mean, variance)
- 3 probability calculation types
- Full offline mode

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/probabilities-of-statistical-distributions/id1165798195/reviews.md

### 5/5 — Easy and useful

*2022-03-11, version 1.0.3*

Great app to teach how basic is statistics and probability. I also use it at work to double check my excel analysis.

### 1/5 — Worst App

*2019-06-05, version 1.0.3*

Not an easy app to use for computation. Worst app for my Statistics class.

### 4/5 — Really good, just need a little more.

*2017-05-23, version 1.0.3*

This app is very good for playing around with different values in the various distributions, and I appreciate it all being in one place. My suggestion is to add a little bit more information to each distribution such as the cumulative function and maybe an example where the distribution is applied.

Also maybe a short definition of the values (mean, standard deviation, etc) for beginners who are interested to learn more.

### 5/5 — nice app

*2017-03-13, version 1.0.2*

Beautiful, useful and simple. Like it.

### 5/5 — Good stats app

*2017-02-03, version 1.0.2*

Thanks for making this; it beats reading tables.

...unfortunately it keeps bugging me to leave a review although I've already left a review.

### 5/5 — Amazing app!!

*2016-12-04, version 1.0.2*

The best statistics app on AppStore!! Advanced calculations in seconds!!

## Frequently asked questions about Probabilities of Statistical Distributions

### What statistical distributions does Probabilities of Statistical Distributions support?

Probabilities of Statistical Distributions supports 17 distributions, including continuous ones like Normal, Uniform, Exponential, Gamma, Beta, Cauchy, Weibull, Chi-Square, F, Student's t, Log-Normal, and Laplace. It also includes discrete distributions such as Binomial, Negative Binomial, Geometric, Hypergeometric, and Poisson.

### Can I use Probabilities of Statistical Distributions offline?

Yes, Probabilities of Statistical Distributions offers a full offline mode, allowing you to compute probabilities and use its features without an internet connection.

### What kind of charts can I create with Probabilities of Statistical Distributions?

The app generates dynamic charts to visualize the distributions. It uses line charts for continuous distributions and bar charts for discrete distributions.

### Does Probabilities of Statistical Distributions allow for complex math input?

Yes, you can insert any mathematical expression using common functions (trigonometric, log, ln, sort, etc.), advanced functions (hyperbolic, versine, etc.), and constants (pi, phi, e, etc.) into the app.

### What information is available in the formulas handbook?

The formulas handbook within Probabilities of Statistical Distributions provides details on the density/mass function, mean, and variance for the supported distributions.

### How many types of probability calculations can I perform?

Probabilities of Statistical Distributions offers three distinct types of probability calculations, providing flexibility for various statistical analyses.

### On which devices can I use Probabilities of Statistical Distributions?

Probabilities of Statistical Distributions is a universal app designed for iPhone, iPad, and iPod touch devices.

### How frequently is Probabilities of Statistical Distributions updated?

The app was last updated on April 17, 2017, with version 1.0.3. It was initially released on November 22, 2016.

## Version history (last 3 releases)

### 1.0.3 — 2017-04-17

This app has been updated by Apple to display the Apple Watch app icon.

Minor bug fixes

### 1.0.2 — 2016-12-03

- Bug fixes

### 1.0 — 2016-11-22

No release notes.

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All apps by Thomas Tsopanakis: https://appshunter.io/developer/471022214

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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 2026-06-10.*