# Stochastic Signal Processing vs Discrete Probability

The clearest difference is update cadence: Discrete Probability at every 4 days against Stochastic Signal Processing's every 5 weeks. Discrete Probability also leads on rating (5.0 vs 4.7). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Discrete Probability holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 6 and 3 respectively.

Stochastic Signal Processing ships an update every 5 weeks, Discrete Probability every 4 days. The most recent releases landed on September 25, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Stochastic Signal Processing | Discrete Probability |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (6 ratings)](https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/discrete-probability/id6752967885/reviews)** |
| Number of ratings | **6** | 3 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Free | Free |
| Size | 73 MB | 9 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Ian Young](https://appshunter.io/developer/1450268178) | [Yuri Morozov](https://appshunter.io/developer/1582368813) |

## What reviewers say

### Stochastic Signal Processing

[App page](https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179)

Explore the processing of random signals like speech, music, and climate data. This interactive textbook offers dynamic information, films, animations, and 59 real-time laboratory experiments using your device's camera and microphone. It's designed for those with prior signal processing and probability theory knowledge.

**Highlights:** Interactive textbook format, Dynamic information display, Films and animations, 59 laboratory experiments, Real-time signal processing, Homework problems

**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 Stochastic Signal Processing free?

Stochastic Signal Processing is free to download, with no in-app purchases.

### Is Discrete Probability free?

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

### Which has better reviews, Stochastic Signal Processing or Discrete Probability?

Discrete Probability is rated higher. Stochastic Signal Processing averages 4.7 out of 5 from 6 ratings, while Discrete Probability averages 5.0 from 3 ratings.

### Do Stochastic Signal Processing or Discrete Probability have ads?

Neither Stochastic Signal Processing nor Discrete Probability shows ads.

### Which is updated more often, Stochastic Signal Processing or Discrete Probability?

Stochastic Signal Processing ships an update every 5 weeks, and Discrete Probability every 4 days. Most recently, Stochastic Signal Processing was updated on September 25, 2026 and Discrete Probability on September 28, 2026.

---

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