# Motor Noise Analyzer vs CDHM Tester

The clearest difference is in-app purchases: CDHM Tester at none against Motor Noise Analyzer's 7. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Motor Noise Analyzer sells 7 one-off in-app purchases. CDHM Tester asks for nothing beyond the download.

Motor Noise Analyzer ships an update every 3 weeks, CDHM Tester every 5 weeks. The most recent releases landed on September 27, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Motor Noise Analyzer | CDHM Tester |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/motor-noise-analyzer/id6478658028/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free | — |
| Size | 23 MB | 30 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Hangzhou Maxwell Network Technology Co., Ltd](https://appshunter.io/developer/1639279827) | [深圳雷诺智能技术有限公司](https://appshunter.io/developer/1764868485) |

## What reviewers say

### Motor Noise Analyzer

[App page](https://appshunter.io/ios/app/motor-noise-analyzer/id6478658028)

This application uses intelligent algorithms and motor engineering knowledge to acquire data, analyze components, and pinpoint noise sources in motors. It provides real-time waterfall and spectrum diagrams, automatically identifying noise frequencies, intensity, order, and sources. Users can generate professional diagnostic reports to enhance motor troubleshooting efficiency and accuracy.

**Highlights:** Intelligent noise data acquisition, Component analysis, Noise source localization, Real-time waterfall and spectrum diagrams, Automatic noise labeling, One-click diagnostic report generation

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Experience Package | $10.00 | one-time |
| Monthly Card 50% Off Activity | $55.90 | one-time |
| Monthly Card | $122.99 | one-time |
| Season Card 50% Off Activity | $139.00 | one-time |
| Season Card | $279.00 | one-time |
| 50% off annual card promotion | $364.99 | one-time |
| Annual Card | $729.00 | one-time |


### CDHM Tester

[App page](https://appshunter.io/ios/app/cdhm-tester/id6667100044)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Motor Noise Analyzer free?

Motor Noise Analyzer is free to download, with in-app purchases available.

### Is CDHM Tester free?

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

### Do Motor Noise Analyzer or CDHM Tester have ads?

Neither Motor Noise Analyzer nor CDHM Tester shows ads.

### Which is updated more often, Motor Noise Analyzer or CDHM Tester?

Motor Noise Analyzer ships an update every 3 weeks, and CDHM Tester every 5 weeks. Most recently, Motor Noise Analyzer was updated on September 27, 2026 and CDHM Tester on October 5, 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.*