Calculate the rpm, depending on the engine sound.

Through the calculation frequency, the sound is analyzed to determine the revolutions of an engine.

It is necessary to indicate the characteristics of the engine prior to reading.

Many negative ratings are due to not having configured the application correctly. Please make sure you understand how to set it up before giving a negative review.

May not work on all engines. It works worst with engines with the exhaust sound very muted and mechanical noise engines (air cooled engines).

It is normal to show random values when the engine is not running.