Engine RPM

Calculate and display RPM of an engine from the sound made by the engine.

App info

Version :

1.6

Category :

Tools

Update :

May 29, 2025

Installs :

1,205

Developer :

Real-Time Specialties

Price :

$6.99

Requires Android :

Android 4.0+

Content Rating :

Everyone

App description

Android App Analysis and Review: Engine RPM, Developed by Real-Time Specialties. Listed in Tools Category. Current Version Is 1.6, Updated On 29/05/2025 . According to users reviews on Google Play: Engine RPM. Achieved Over 1 thousand Installs. Engine RPM Currently Has 14 Reviews, Average Rating 4.1 Stars

Please read all of the following before buying this app:

The Engine RPM app is designed to listen to the sound of an engine and from that sound, calculate and display the RPM of that engine. However the app cannot determine the RPM if the sound is inadequate, or if the app has not been properly configured for that specific engine. The sound must be clear and steady and must not have too much noise in the background. The app works the best on engines with minimal or no mufflers, such as motorcycles, lawnmowers, leaf blowers, small aircraft engines, and the like. It works better at high RPMs than at idle. For cars with modern mufflers the app will not be able to measure the RPM near idle, or if the app is listening from inside the car with the doors and windows closed. The sound inside a modern car is much too quiet for this to work.

Engine RPM is not designed to be a replacement for an operational tachometer. For safety reasons it should only be used as a diagnostic and calibration tool for things like engine tuning or checking the calibration of a regular tachometer. Engine RPM is very accurate when it is able to lock on to the sound, often to within 10 RPM or better. The app is configurable for 2-cycle and 4-cycle engines and includes a generic configuration for unusual cases, such as a reduction gear. The normal RPM range is 400 to 90,000 RPM. For more information download the operations manual from:

www.tunelab-world.com/rpm

What's New

This app was recompiled for performance and compatibility with Android 15.

Rate and review on Google Play store

4.1

14 total

5 83.3

4 0

3 0

2 8.3

1 8.3

Total number of installs (*estimated)

Estimation of total number of installs on Google Play, Approximated from number of ratings and install bounds achieved on Google Play.

Recent Comments

Josh Ely

Perfect! As an advanced diy small engine mechanic I wanted to be able to get a rough idea of engine rpm without getting my phototach or inductive pick up out. This did exactly what it says. Tested on 3 small engines (Honda GV160 and Briggs L-head) and the initial results seemed too accurate. So I decided to pull out my clamp on rpm meter. There was always less than 2% difference and usually a 1% or less difference. All tests were between 2,600 and 3,400 rpm. It's worth double what they charge!

Ates Gurcan

Finally a tachometer that works with my model diesel engines. Quite accurate. I used it to measure RPM off of recorded videos, from live engines with good results. The looks could be improved but the performance makes up for it. Thank you!

Mike Daly

I use this to "break in" my electric motors I use for Tamiya Mini 4wd racing. I previously used Giri and this app works much better and gives the user far more finite control. Highly recommend and well worth the price. Plus this can be used on my android phone where Giri is for Apple phones.