Probability-Distributions

Name: Probability-Distributions
Rating: 4.9 (193 reviews)
Author: Matthew Bognar

By: Matthew Bognar

Education

Features & Capabilities

Probability-Distributions is an educational tool for learning statistics. It lets you compute probabilities, approximate percentiles, and plot probability density functions (PDFs) for a wide range of continuous distributions, including normal, t, chi-square, F, exponential, gamma, beta, log-normal, Pareto, and Weibull.

For discrete models, it supports binomial, geometric, hypergeometric, Poisson, and negative binomial distributions, showing probabilities and PMFs to aid intuition and coursework.

User Growth & Download Statistics

App Education Data

By:

Matthew Bognar

Rating:

4.90

(193)

Version:

0.9.3 Last updated: 2025-07-13

Version code:

876328182

Creation date:

2014-06-22

Compatible devices:

Size:

2.35MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-07

Compare stats and ranking:

Ranking

# 113,060 ▲ 895

Other platforms

Probability Distributions (v5.8)

701,626 4.83

(1,969)

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Matthew Bognar

Apple Apps Store

https://apps.apple.com/us/app/probability-distributions/id889106396

User Reviews

Overall, users praise Probability-Distributions for being free, easy to use, and graphically oriented, with broad coverage of distributions and quick calculations. They value raw-data input for hypothesis testing and confidence intervals, plus easy access to formulas for mean and variance. The app is especially helpful for budget-conscious students. The main drawback is that some professors prohibit using it on exams, limiting classroom applicability. In short, a focused, practical tool with strong visualization and accessible design.

Pros

Free access to advanced probability functions (e.g., binomial pdf) without paying for a calculator
Easy to use with a clean, user-friendly UI
Includes graphical visualizations of distributions to aid understanding
Broad distribution coverage with quick computations and links to formulas for mean/variance; supports raw-data input for hypothesis testing and confidence intervals
Valued by students and educators as a budget-friendly, practical learning tool

Cons