Motor Pitch Analyzer vs Aray DC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Motor Pitch Analyzer
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.
- 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
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MotorPitchAnalyzer (MPA) is an app for measuring small motor rotation speed in real-time. Just bring the motor close to your smartphone's microphone for easy measurement! You can improve accuracy by narrowing the measurement range. The app shows the motor's maximum rotation speed based on stable rotation and frequency intensity. You can also quickly check for shaft runout and brush conditions by viewing the motor sound waveform in real-time (※ for rough guidance). Please measure in a quiet place for accurate results. Note that measurement accuracy may vary slightly depending on your iPhone or iPad's microphone performance.
Aray DC
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Aray DC is a smart monitoring and management platform designed for mobile portable energy storage devices. After registering and logging in, users can connect via Bluetooth to nearby devices, enabling real-time monitoring, improved O&M efficiency, and enhanced system security. Main features: Device Monitoring: Real-time view of core data such as voltage, current, and power. Safety Management: Instant alerts for abnormal device status, helping users quickly locate issues. Account Login: After login, search via Bluetooth to connect to your dedicated hardware device. Wherever you are, Aray DC enables efficient management of your energy storage system, improving reliability and safety.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Motor Pitch Analyzer | Aray DC |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 103 MB | 27 MB |
| Age rating | 4+ | 17+ |
| Developer | Shiho Masuda | 深圳市傲雷新能源科技有限公司 |
In-app purchases
Motor Pitch Analyzer
No in-app purchases
Aray DC
No in-app purchases
