# Mad Func vs Discrete Probability

The clearest difference is in-app purchases: Discrete Probability at none against Mad Func's 1. Discrete Probability also leads on ratings volume (3 vs 1) and iOS requirement (16.6 vs 18.0). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Mad Func sells 1 in-app purchase, starting at $2.99 per 7 days. Discrete Probability asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Mad Func against 5.0 for Discrete Probability. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Mad Func ships an update every 3 days, Discrete Probability every 4 days. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Mad Func | Discrete Probability |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/mad-func/id6747051739/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/discrete-probability/id6752967885/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 28 MB | 9 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Gina De La Rosa](https://appshunter.io/developer/1315362641) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## What reviewers say

### Mad Func

[App page](https://appshunter.io/ios/app/mad-func/id6747051739)

Learn algorithms and coding concepts through interactive, gamified challenges. Solve puzzles by arranging code blocks, debug issues, and tackle system design problems. Track your progress and prepare for interviews or strengthen your computer science fundamentals.

**Highlights:** Gamified algorithm puzzles, Interactive debugging, System design challenges, Multi-language support, Progress tracking dashboard, Weekly new challenges

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mad Func Pro | $2.99 | per 7 days |


### 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 Mad Func free?

Mad Func is free to download, with in-app purchases available.

### Is Discrete Probability free?

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

### Which has better reviews, Mad Func or Discrete Probability?

Mad Func and Discrete Probability are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Mad Func or Discrete Probability have ads?

Neither Mad Func nor Discrete Probability shows ads.

### Which is updated more often, Mad Func or Discrete Probability?

Mad Func ships an update every 3 days, and Discrete Probability every 4 days. Most recently, Mad Func was updated on October 2, 2026 and Discrete Probability on September 28, 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.*