# Stochastic Signal Processing vs Pic2Mag

The clearest difference is update cadence: Stochastic Signal Processing at every 5 weeks against Pic2Mag's every 31 months. Stochastic Signal Processing also leads on ratings volume (6 vs 1). Pic2Mag's advantage is rating (5.0 vs 4.7) and iOS requirement (8.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Pic2Mag holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Stochastic Signal Processing has 6 ratings behind it against 1, so its average is the more settled of the two.

Stochastic Signal Processing ships an update every 5 weeks, Pic2Mag every 31 months. The most recent releases landed on September 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Stochastic Signal Processing | Pic2Mag |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (6 ratings)](https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pic2mag/id1514504657/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 31 months |
| Monetization | Free | Free |
| Size | 73 MB | 108 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ian Young](https://appshunter.io/developer/1450268178) | [Michael Snyder](https://appshunter.io/developer/1514504656) |

## 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


### Pic2Mag

[App page](https://appshunter.io/ios/app/pic2mag/id1514504657)

Visualize magnetic and electric fields by drawing magnets or charges. This educational tool helps students understand physics concepts by displaying field lines and voltage potentials. It offers a free, ad-free learning experience for iOS devices.

**Highlights:** Draw magnets to visualize magnetic fields, Draw charges to visualize electric fields, Magnetostatic and Electrostatic modes, Field line and voltage potential plotting, Caches results for faster processing, Ad-free learning experience

**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 Pic2Mag free?

Pic2Mag is free to download, with no in-app purchases.

### Which has better reviews, Stochastic Signal Processing or Pic2Mag?

Pic2Mag is rated higher. Stochastic Signal Processing averages 4.7 out of 5 from 6 ratings, while Pic2Mag averages 5.0 from 1 ratings.

### Do Stochastic Signal Processing or Pic2Mag have ads?

Neither Stochastic Signal Processing nor Pic2Mag shows ads.

### Which is updated more often, Stochastic Signal Processing or Pic2Mag?

Stochastic Signal Processing ships an update every 5 weeks, and Pic2Mag every 31 months. Most recently, Stochastic Signal Processing was updated on September 25, 2026 and Pic2Mag on October 8, 2026.

---

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