# Motor Pitch Analyzer vs Aray DC

The clearest difference is ads: Aray DC at none against Motor Pitch Analyzer's shown. Motor Pitch Analyzer's advantage is update cadence (monthly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Motor Pitch Analyzer ships an update monthly, Aray DC every 2 months. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Motor Pitch Analyzer | Aray DC |
| --- | --- | --- |
| 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 | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 103 MB | 27 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shiho Masuda](https://appshunter.io/developer/500997902) | [深圳市傲雷新能源科技有限公司](https://appshunter.io/developer/1830665558) |

## What reviewers say

### 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


### Aray DC

[App page](https://appshunter.io/ios/app/aray-dc/id6757346153)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Motor Pitch Analyzer free?

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

### Is Aray DC free?

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

### Do Motor Pitch Analyzer or Aray DC have ads?

Motor Pitch Analyzer shows ads; Aray DC does not.

### Which is updated more often, Motor Pitch Analyzer or Aray DC?

Motor Pitch Analyzer ships an update monthly, and Aray DC every 2 months. Most recently, Motor Pitch Analyzer was updated on November 4, 2026 and Aray DC on October 31, 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.*