# VibraPad vs Stochastic Signal Processing

The clearest difference is price: Stochastic Signal Processing at Free against VibraPad's $119.99. Stochastic Signal Processing also leads on rating (4.7 vs 4.0) and update cadence (every 5 weeks vs every 4 months). VibraPad's advantage is review sentiment (100% vs 67%) and iOS requirement (9.0 vs 15.0). On ads and in-app purchases there is nothing between them.

Stochastic Signal Processing is free to download; VibraPad costs $119.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stochastic Signal Processing holds the better App Store score, 4.7 against 4.0. 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. Written reviews complicate that: 100% of VibraPad's written reviews are positive against 67% of Stochastic Signal Processing's, so the app with the better star average is not the one people write more warmly about.

VibraPad ships an update every 4 months, Stochastic Signal Processing every 5 weeks. The most recent releases landed on June 5, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | VibraPad | Stochastic Signal Processing |
| --- | --- | --- |
| Price | $119.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/vibrapad/id452182524/reviews) | **[4.7 (6 ratings)](https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179/reviews)** |
| Number of ratings | 1 | **6** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 12 MB | 73 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Motionics, LLC](https://appshunter.io/developer/424498959) | [Ian Young](https://appshunter.io/developer/1450268178) |

## What reviewers say

### VibraPad

[App page](https://appshunter.io/ios/app/vibrapad/id452182524)

Learn the fundamentals of vibration analysis for machinery monitoring and diagnostics. Build virtual systems from a library of components, analyze sound signals via your device's microphone, and generate detailed reports. Optional external hardware enhances vibration data acquisition.

**Highlights:** Machine component library, Drag-and-drop system assembly, Sound signal acquisition via mic, External accelerometer data support, Live signal monitoring (time/frequency), Fundamental frequency calculator, Report generation and email

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 VibraPad free?

VibraPad costs $119.99, with no in-app purchases.

### Is Stochastic Signal Processing free?

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

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

Stochastic Signal Processing is rated higher. VibraPad averages 4.0 out of 5 from 1 ratings, while Stochastic Signal Processing averages 4.7 from 6 ratings.

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

Neither VibraPad nor Stochastic Signal Processing shows ads.

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

VibraPad ships an update every 4 months, and Stochastic Signal Processing every 5 weeks. Most recently, VibraPad was updated on June 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.*