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About the application:

Please read all of the following before buying this app: The Engine RPM apk is designed to listen to the sound of an engine and from that sound, calculate and display the RPM of that engine. However the apk is not magic. It cannot determine the RPM if the sound is inadequate, or if the apk 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. In general, if the sound has a definite musical pitch to it, Engine RPM will be able to measure the RPM. The apk works the best on engines with minimal or no mufflers, such as motorcycles, lawnmowers, leaf blowers, little aircraft engines, and the like. It works better at high RPMs than at idle. For vehicles with modern mufflers the apk will not be able to measure the RPM near idle, or if the apk is listening from inside the vehicle with the doors and windows closed. The sound inside a modern vehicle is much too quiet for this to work. Engine RPM is not designed to be a replacement for an operational tachometer. For security reasons it could only be used as a diagnostic and calibration program 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 apk is configurable for 2-cycle and 4-cycle engines and contains a generic configuration for unusual cases, such as a reduction gear. The normal RPM range is 400 to 90,000 RPM. For more info download the operations manual from: www.tunelab-world.com/rpm