Motor Pitch Analyzer
Contains ads
3.1star
94 reviews
10K+
Downloads
Everyone
info
About this app
MotorPitchAnalyzer 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.
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.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
Ratings and reviews
3.0
90 reviews
Kyle
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February 3, 2025
I'm glad I found this! I was watching my laundry tumble in a front loading washer and thought, "I wonder if there's an app to find out the RPM of that drum." Turns out, I can get the approximate RPM of the motor from sound! That's awesome! As an electrician, I'll be sure to exhaust all the possibilities of usefulness this app has! Thanks to you! ...Crazy side note... it picked up my heartbeat and ticking wall clock in an otherwise silent room!
2 people found this review helpful
Dirt Track Dave
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January 5, 2026
Was able to determine rpm of electric motors I tested this far. However it does not do well at a distance and need to be within 1 m of object being tested. ai found it mainly depends on quality of your phones microphone. I used several other apps to find rpm on things no luck. this app had done simple RPM analysis medium volume and up.
1 person found this review helpful
Johan De Kock
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December 7, 2025
i have tried everything. the latest update does not work anymore. 07/12/25. the latest update still doesnt work. i have again revetted to version 1.13. that still works.
Shiho Masuda
December 8, 2025
引き続きご迷惑をおかけし、申し訳ありません。今回のバージョン（1.5.0)では動作しない場合、Dialogを表示し、エラーコードを表示するようにしました。もしよろしければエラーコードを教えてもらえますか？
What’s new
◆v1.5.0 Update Contents
◇New Features
・Android 16 is now supported.
・Added optional error reporting for issue diagnosis.
If initialization fails, an error code will be shown, allowing users to optionally send a report to the developer.
◇Fixes
・Resolved a bug causing freezing during initialization and startup.
・Updated the development engine to the latest version, patching security vulnerabilities.
※No change to rotational speed calculation logic.
◇New Features
・Android 16 is now supported.
・Added optional error reporting for issue diagnosis.
If initialization fails, an error code will be shown, allowing users to optionally send a report to the developer.
◇Fixes
・Resolved a bug causing freezing during initialization and startup.
・Updated the development engine to the latest version, patching security vulnerabilities.
※No change to rotational speed calculation logic.
App support
About the developer
増田 宗嶺
jobar.iphone@gmail.com
Japan
