Tachometer engineer measures speed of moving object in Hz and RPM using camera
10,000+ downloads
About Tachometer Engineer
Tachometer Engineer is a tools app developed by GyokovSolutions.
Download Statistics
Tachometer Engineer has been downloaded 10 thousand times. In the last 30 days, the app was downloaded 700 times.
User Ratings
The app has no ratings yet.
App Information
Tachometer Engineer is FREE to download. The APK download size is 3.92 MB. The latest version available is 2.1. The last update was on September 20, 2025.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play May 2025.
Description
Tachometer Engineer uses phone camera to analyze periodically moving objects and determines frequency in - Hz (Hertz - number of cycles per second) - RPM (revolutions per minute)
Frequency can be determined - automatically - by the app - manually - by comparing captured images during measurement and selecting two similar images
How to use: - point the camera to the object and press START - hold steady for 5 seconds - result is shown in Hz and RPM - if needed open Menu - Open images and manually determine exact frequency and RPM by selecting two similar images from captured images. The app will calculate time difference between them and determine frequency in Hz and RPM.
You can also use images captured during measurement to determine better speed of an object. Usual frame rate is 60 frames per second. To activate image saving click on disk icon. Then select image resolution. If your phone can not handle this resolution choose smaller resolution. At the end of measurement a message will be shown with information how many images were saved. Images are saved in folder Pictures/TachometerEngineer. The name of the images contains information how many milliseconds they were taken relative to first picture.
To calculate exact frequency and RPM open captured images by selecting MENU - Open images. Select measurement folder. The app shows all images for selected measurement. Select two similar images by long clicking on them and selecting image as first or second image. Then the app calculates time difference between them and exact frequency and RPM.
Minimum and maximum frequency can be set in SETTINGS - TACHOMETER. Increasing minimum frequency will reduce time needed for measurement. Maximum frequency is 30Hz (1800 RPM). Increasing maximum frequency will reduce time needed for processing during measurement.
Recent changes: Tachometer Engineer uses phone camera to analyze periodically moving objects and determines frequency in - Hz (Hertz - number of cycles per second) - RPM (revolutions per minute)
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Works really well. I tested it out on my Kitchen aid mixer that I tuned last week, and it reported the exact rpm I was targeting for the two reference speeds. Great job!
★★★★★Meger Niche· Jun 6, 2025
This app WORKS, easy to use as well, would gladly pay for this app.
★★☆☆☆Jester O'thePines· Jun 2, 2026
I appreciate the effort but based on the level of inaccuracy I experienced this app isn't helpful at best, generally worse it's a complete waste of precious time. For example It gave results ranging from 54rpm to 540rmp when targeting a stationary object.
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Technologies used by Tachometer Engineer
Tachometer Engineer is requesting 15 permissions and we don't have library information (yet).
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