# TruthMarker vs Motor Pitch Analyzer

The clearest difference is device support: Motor Pitch Analyzer at 3 against TruthMarker's —. Motor Pitch Analyzer also leads on iOS requirement (13.0 vs 17.6). On price 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.

## The numbers

| Metric | TruthMarker | Motor Pitch Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/motor-pitch-analyzer/id6502329028/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | — | Yes |
| Update frequency | — | Monthly |
| Monetization | — | Ad-supported |
| Size | 3 MB | 103 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [The University of Iowa (ITS)](https://appshunter.io/developer/322967701) | [Shiho Masuda](https://appshunter.io/developer/500997902) |

## What reviewers say

### TruthMarker

[App page](https://appshunter.io/ios/app/truthmarker/id1525749443)

**In-app purchases:** none


### Motor Pitch Analyzer

[App page](https://appshunter.io/ios/app/motor-pitch-analyzer/id6502329028)

Measure small motor rotation speed in real-time using your smartphone's microphone. View motor sound waveforms for rough guidance on shaft runout and brush conditions. Achieve better accuracy by narrowing the measurement range in a quiet environment.

**Highlights:** Real-time motor RPM measurement, Motor sound waveform visualization, Adjustable measurement range for accuracy, Analysis of shaft runout and brush conditions, Quiet environment measurement recommendation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TruthMarker free?

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

### Is Motor Pitch Analyzer free?

Motor Pitch Analyzer is free to download, with no in-app purchases.

---

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