# Population Simulator vs Stochastic Signal Processing

The clearest difference is in-app purchases: Stochastic Signal Processing at none against Population Simulator's 1. Stochastic Signal Processing also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 7 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Population Simulator sells 1 one-off in-app purchase. Stochastic Signal Processing asks for nothing beyond the download.

Population Simulator ships an update every 7 months, Stochastic Signal Processing every 5 weeks. The most recent releases landed on October 5, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Population Simulator | Stochastic Signal Processing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (6 ratings)](https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 5 MB | 73 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAIKI HIRATA](https://appshunter.io/developer/719880632) | [Ian Young](https://appshunter.io/developer/1450268178) |

## What reviewers say

### Population Simulator

[App page](https://appshunter.io/ios/app/population-simulator/id882348321)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add Output Function | $0.99 | one-time |


### 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


## Frequently asked questions

### Is Population Simulator free?

Population Simulator is free to download, with in-app purchases available.

### Is Stochastic Signal Processing free?

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

### Do Population Simulator or Stochastic Signal Processing have ads?

Population Simulator shows ads; Stochastic Signal Processing does not.

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

Population Simulator ships an update every 7 months, and Stochastic Signal Processing every 5 weeks. Most recently, Population Simulator was updated on October 5, 2026 and Stochastic Signal Processing on September 25, 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.*