# Probability Lab — Distribution Calculator

> Distribution Calculator (iPhone/iPad app by Jin Zhang.)

- Source: https://appshunter.io/ios/app/probability-lab/id6794881706 (this page in markdown: same URL + `.md`)
- Developer: [Jin Zhang](https://appshunter.io/developer/1830436291)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 4 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-08-04
- Data updated: 2026-08-13
- User reviews in markdown: https://appshunter.io/ios/app/probability-lab/id6794881706/reviews.md

## What is Probability Lab?

Probability Lab is an interactive toolkit for exploring probability distributions and statistical concepts.

Choose from a wide range of continuous and discrete probability distributions, including the Normal, Binomial, Poisson, Beta, Gamma, Student's t, Chi-Square, and many more. Instantly compute probability density (PDF), cumulative distribution (CDF), inverse CDF (quantile), and other distribution functions with precise results.

Visualize every distribution using smooth, interactive graphs. Adjust parameters in real time and watch the curve update instantly, making it easy to build intuition about how each parameter affects the distribution.

Whether you're studying for a statistics course, teaching probability, or simply exploring mathematical concepts, Probability Lab provides a fast, intuitive, and beautiful way to understand probability distributions.

**Features**
• 15+ continuous and discrete probability distributions
• Compute PDF, PMF, CDF, inverse CDF (quantile), and more
• Interactive graphs with real-time parameter adjustment
• Smooth, high-quality visualizations
• Designed for students, educators, and anyone learning probability and statistics


For questions or feedback, contact us anytime at 
chordstudio3572@outlook.com

Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Probability Lab Pro | $9.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-05

No release notes.

## More apps by Jin Zhang

- [Chord Studio](https://appshunter.io/ios/app/chord-studio/id6749439732)

All apps by Jin Zhang: https://appshunter.io/developer/1830436291

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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 2026-08-13.*