The purpose of this tool is to measure the frequency of a sound source of constant frequency such as belt tension measurement.

You can set the sensitivity to the sound you want to measure with the sensitivity adjustment button.

The frequency (Hz) is displayed upon detection of the sound.

You can check the detected frequency by pressing the "Start" button, and also check the average value.

You can also adjust the measurement sensitivity with the sensitivity adjustment button.

This tool is compatible with Android. It is designed to run on Android devices. It does not have any special requirements. You can use it on any device that can run Android.

This tool uses the recording function of Android, and so it depends on the model.