This app measures the idle speed of a 4-stroke combustion engine based on the sound of the exhaust.
This type of tool is often referred to as an acoustic tachometer.
It works best on motorcycle engines that have 1 or 2 cylinders and a clear exhaust note.
There is no guarantee that this app will provide accurate results.
https://andro.io/app/idletach
Power 100
Android app profile
idleTach for Android – Latest Version & Features
by Convenient Measurement Apps
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> 2.2k
Monthly Downloads
~$900
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