# Motor Pitch Analyzer — Motor RPM monitoring > Real-time motor rotation speed and sound waveform analysis app. (iPhone/iPad app by Shiho Masuda.) - Source: https://appshunter.io/ios/app/motor-pitch-analyzer/id6502329028 (this page in markdown: same URL + `.md`) - Developer: [Shiho Masuda](https://appshunter.io/developer/500997902) - Category: Utilities - Price: Free - Rating: 1.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 13.0 · 103 MB - Languages: English, Japanese - Released: 2024-06-09 - Data updated: 2026-06-02 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/motor-pitch-analyzer/id6502329028/reviews.md ## What is Motor Pitch Analyzer? 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. ## Key features - 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 ## Frequently asked questions about Motor Pitch Analyzer ### How does Motor Pitch Analyzer measure motor speed? Motor Pitch Analyzer uses your smartphone's microphone to listen to the motor's rotation. By analyzing the sound frequency, it calculates the motor's RPM in real-time. ### Can Motor Pitch Analyzer detect motor problems? Yes, it can provide rough guidance on shaft runout and brush conditions by visualizing the motor's sound waveform in real-time. This is intended for preliminary assessment. ### How can I improve measurement accuracy with Motor Pitch Analyzer? For best results, measure in a quiet environment to minimize background noise. You can also improve accuracy by narrowing the measurement range within the app settings. ### What devices is Motor Pitch Analyzer compatible with? Motor Pitch Analyzer is compatible with iPhones, iPads, and iPods. It requires iOS 4+ and is optimized for various Apple devices. ### Does Motor Pitch Analyzer have ads? Yes, Motor Pitch Analyzer contains advertisements. This allows the app to be offered for free to users. ### What is the age rating for Motor Pitch Analyzer? Motor Pitch Analyzer has an age rating of 4+, making it suitable for a wide range of users. ### How often is Motor Pitch Analyzer updated? The latest version, 1.4.0, was released on June 12, 2025, indicating active development and regular updates for the application. ### What is the user feedback on Motor Pitch Analyzer? Currently, Motor Pitch Analyzer has a rating of 1.0 stars from 1 rating. This suggests limited user feedback available at this time. ## Version history (last 5 releases) ### 1.4.0 — 2025-06-12 ◆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. ### 1.3.0 — 2024-09-23 ◆v1.3.0 Update Contents ◇ Adds ・Supported iOS18 ・Added function explanation screen. The explanation of the narrowing function of the measurement range, waveform graph, rotation value, etc. are now displayed. ・Added an inquiry item. Bug reports and inquiry items were added to the STAFF page. ◇ Fixes ・Some notations in the STAFF page were changed. ### 1.2.0 — 2024-08-27 ◆v1.1.0 Update Contents ◇ Fixes ・Regarding the Issue Where the Displayed Rotation Speed Often Shows the Same Value Analysis of the recorded spectrum in 2048 steps revealed that the peak rotational speed was detected at 645.9 RPM increments, and no difference below that could be recognized. In this version, interpolation has been introduced for more accurate readings. We apologize for any inconvenience caused. ・Design Deletion and Fixed ### 1.1.0 — 2024-06-22 ◆v1.1.0 Update Contents ◇ Fixes ・Fixed the issue with measuring high-speed motors. The initial limit is now 50,000 rpm. You can change this limit anytime from the Settings button. ・Adjustment of the layout ◇ Additions ・Added a feature to save motor RPM data. Press the SAVE button to save up to 100 entries. ・Added a feature to manage saved motors in a list. Press the MotorList button at the bottom to view saved motors. You can also enter the motor number and ampere information. ### 1.0.1 — 2024-06-12 ◆ v1.0.1 ・Fixed an issue with image rendering. ## Apps similar to Motor Pitch Analyzer | App | Rating | Price | Category | | --- | --- | --- | --- | | [Anker](https://appshunter.io/ios/app/anker/id1635029057) | 4.5 (1,111) | Free | Utilities | | [LiMeta](https://appshunter.io/ios/app/limeta/id1640620983) | 3.3 (4) | Free | Utilities | | [MC3000](https://appshunter.io/ios/app/mc3000/id949072025) | 3.8 (14) | Free | Utilities | | [BREVE V1.0](https://appshunter.io/ios/app/breve-v10/id6448748065) | — | Free | Utilities | | [ISD Go](https://appshunter.io/ios/app/isd-go/id1447072980) | 1.8 (30) | Free | Utilities | | [Strobe tachometer (RPM meter)](https://appshunter.io/ios/app/strobe-tachometer-rpm-meter/id831460940) | 4.4 (79) | Free | Utilities | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-02.*