# Learn Shell Scripting Pro vs Discrete Probability

The clearest difference is price: Discrete Probability at Free against Learn Shell Scripting Pro's $4.99. Discrete Probability also leads on update cadence (every 4 days vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Discrete Probability is free to download; Learn Shell Scripting Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn Shell Scripting Pro ships an update every 3 months, Discrete Probability every 4 days. The most recent releases landed on September 16, 2026 and July 17, 2026 respectively.

## The numbers

| Metric | Learn Shell Scripting Pro | Discrete Probability |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/discrete-probability/id6752967885/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 12 MB | 9 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [ALG Software Lab](https://appshunter.io/developer/1650561236) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## What reviewers say

### Learn Shell Scripting Pro

[App page](https://appshunter.io/ios/app/learn-shell-scripting-pro/id6747474775)

**Features:** Vision Pro support

**In-app purchases:** none


### Discrete Probability

[App page](https://appshunter.io/ios/app/discrete-probability/id6752967885)

This app provides a comprehensive tool for learning and calculating discrete probability distributions. It includes formulas with derivations, visual tools like histograms, and descriptions of optimized computation methods. It covers general concepts and several specific distributions.

**Highlights:** User-friendly calculator, Formulas with derivations, Exportable formulas (image/LaTeX), Optimized computation methods, Histograms and visual tools, General concepts and specific distributions

**In-app purchases:** none


## Frequently asked questions

### Is Learn Shell Scripting Pro free?

Learn Shell Scripting Pro costs $4.99, with no in-app purchases.

### Is Discrete Probability free?

Discrete Probability is free to download, with no in-app purchases.

### Do Learn Shell Scripting Pro or Discrete Probability have ads?

Neither Learn Shell Scripting Pro nor Discrete Probability shows ads.

### Which is updated more often, Learn Shell Scripting Pro or Discrete Probability?

Learn Shell Scripting Pro ships an update every 3 months, and Discrete Probability every 4 days. Most recently, Learn Shell Scripting Pro was updated on September 16, 2026 and Discrete Probability on July 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*