RPMmtr

RPMmtr

RPM Tachometer based on Sound

8 ratings
10 reviews

Archived App

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • February 7, 2021
  • October 20, 2021

Features

RPMmtr video #1 for iPhone
RPMmtr screenshot #2 for iPhone
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About

This app measures rotational speed (RPM) by analyzing the sound patterns of engines and machinery. It offers tachometer, tracking, and spectrogram views to visualize the data, with accuracy depending on sound clarity and minimal background noise.

Sound pattern analysis for RPM measurement
Tachometer view for at-a-glance speed
Tracking view for speed evolution over time
Spectrogram view for frequency distribution
Adjustable RPM range control
Accuracy indication through visual cues
Show original description

What's New in RPMmtr

1.5

October 20, 2021

- Analysis quality warning - Predefined suggestions for RPM ranges - Correction factor for dominant harmonic order

More

User reviews

Don't get this app

Doesn't work as advertised. Benchmarked against built in tach. Did not match at idle or under throttle. Always showed weak signal even when held against engine case. Tried on parallel twin 4-stroke and single cylinder 2-stroke

Not worth it if it was free.

App does not work different rpm every time the app is opened under identical conditions and the numbers are not remotely close.

Don’t buy. Does Not Work.

I tried everything to get this app to work, but it kept saying to hold it closer. I couldn’t have held it any closer. Simply doesn’t work. Luckily it’s not very expensive, but I should have thought to check the reviews before wasting a couple bucks 😔

Didn’t work as intended

The app couldn’t pick up the sound of my Yamaha xvs650, despite being repetitive and loud. Put it right up to the exhaust at one point and still no dice.

Complete rubbish

Don’t waste one penny on this, complete waste of time. It’s just a rip off. I got the same RPMs when it was next to the engine, and when the engine was completely turned off, and in a very quiet environment.

FAQ

What is RPMmtr?

RPMmtr is a productivity app that measures rotational speed (RPM) by analyzing the sound patterns of engines and machinery. It provides various views to display this data for educational purposes.

How accurate is RPMmtr?

The accuracy of RPMmtr depends heavily on the clarity of the sound source and the absence of background noise. The app indicates measurement clarity and accuracy through visual cues in its different views.

What devices does RPMmtr support?

RPMmtr is supported on iPhone and iPod devices. It was last updated on October 20, 2021, with version 1.5.

What is the price of RPMmtr?

RPMmtr is a paid application, available for $1.99. There are no in-app purchases or advertisements mentioned for this app.

What is the age rating for RPMmtr?

RPMmtr has an age rating of 4+, making it suitable for a wide range of users. The app is intended for educational purposes.

Does RPMmtr have ads?

No, RPMmtr does not contain advertisements. The app is a paid download and does not feature any in-app ads.

Can RPMmtr be used for professional diagnostics?

RPMmtr is explicitly stated to be for educational purposes only. The developers do not take responsibility for decisions made based solely on the information provided by the app.

How often is RPMmtr updated?

RPMmtr was last updated on October 20, 2021, to version 1.5. The initial release date was February 7, 2021.