# PHP Programming Guide vs Discrete Probability

The clearest difference is update cadence: Discrete Probability at every 4 days against PHP Programming Guide's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PHP Programming Guide 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 | PHP Programming Guide | Discrete Probability |
| --- | --- | --- |
| Price | Free | 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 | 13 MB | 9 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad | **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

### PHP Programming Guide

[App page](https://appshunter.io/ios/app/php-programming-guide/id6748204544)

**Features:** macOS Compatibility, 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 PHP Programming Guide free?

PHP Programming Guide is free to download, with no in-app purchases.

### Is Discrete Probability free?

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

### Do PHP Programming Guide or Discrete Probability have ads?

Neither PHP Programming Guide nor Discrete Probability shows ads.

### Which is updated more often, PHP Programming Guide or Discrete Probability?

PHP Programming Guide ships an update every 3 months, and Discrete Probability every 4 days. Most recently, PHP Programming Guide 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.*