# Stochastic Signal Processing vs Matrix

The clearest difference is ads: Stochastic Signal Processing at none against Matrix's shown. Stochastic Signal Processing also leads on iOS requirement (12.0 vs 15.1). On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on July 5, 2026 and December 3, 2025 respectively.

## The numbers

| Metric | Stochastic Signal Processing | Matrix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Free | — |
| Size | 71 MB | 32 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ian Young](https://appshunter.io/developer/1450268178) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## 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

**In-app purchases:** none


### Matrix

[App page](https://appshunter.io/ios/app/matrix/id1619005601)

**Features:** macOS Compatibility

**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 Matrix free?

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

### Do Stochastic Signal Processing or Matrix have ads?

Matrix shows ads; Stochastic Signal Processing does not.

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

Stochastic Signal Processing ships an update every 5 weeks, and Matrix every 5 weeks. Most recently, Stochastic Signal Processing was updated on July 5, 2026 and Matrix on December 3, 2025.

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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.*