About this app
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.
Latest release
What’s New
◆v1.4.0 Update Contents ◇Adds ・Added “Contact Us” function. Added a SNS link to send a DM to the developer on the STAFF screen. Please contact us if you have any requests. ◇Fixes ・The "Ad System" has been updated.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 30, 2026 · 10:39 PM Free
Screenshots
