Harmoniums - Sound therapy logo

Harmoniums - Sound therapy for iOS

By Masaru Suzuki Free

Developer's Description

Harmonium is a sound therapy application that makes the rhythm of the moon and the sea permeate into you.


Harmonium creates healing sounds from the moon's astronomical location(moon phase and distance between the earth and the moon) and weather forecast (atmospheric pressure and tide level).

This healing sound consists of the sound of waves, the sounds of creatures, the sounds of rain and thunder, and a piano tuned to 432 Hz.

In addition, we refer to the brain science study that the relaxation of the mind and body will increase when the brain wave of a person becomes 8 to 13 Hz. Harmonium reproduces the phenomenon called Brainstem Frequency Following Response(FFR) to obtain the brain waves of this frequency.

Harmonium makes use of two types of FFR guiding sounds, 432Hz and 528Hz, according to the position of the moon and, while aligning with the tide level in real-time, changes the frequencies of the left and right sounds like the ebb and flow of the tide, guiding the brainwaves to 7.83Hz, a little lower than 8Hz.

Harmonium evokes a sense that perceive the rhythm of nature.


Harmonium has three channels.

1. Concentration

Play only the ocean wave sounds.(45 min)

There are 24 ocean sound files in Harmoniums.

2. Relax

Added FFR guidance sound to the ocean wave sounds.(30 min)

3. Sleep

Ocean wave sounds,Creatures living around the ocean, Weather sounds of rain and thunder, Felt piano sound, and FFR guidance sound.(60 min)

When the moon leaves the earth, FFR guidance sound is 528 Hz, and when the moon approaches the earth, it is 432 Hz.

During the tide rise, add the target EEG frequency to the FFR guidance sound. Subtract when the tide is falling.


At the moon moves away from the earth, the tide is rising

Left ear:528Hz + 7.83Hz = 535.83Hz

Right ear:528Hz + 0 = 528Hz

535.83Hz - 528Hz = 7.83Hz


Harmonium uses special sounds known as Frequency Following Response soundA similar sound is binaural beats.Therefore, please do not use this app in the following cases.

If you suffer from epileptic seizures.

If you suffer from heart disease.

If you use a pacemaker.

If you are driving a car or ship,bike,bicycle.

If you operating a machine.

If you are less than 12 years old.

If you feel physical or mental discomfort, please discontinue use immediately.

The tide level information is a forecast value(astronomical tide).

it differs from the tide level actually observed(measured tide level).

Do not use this application for voyage, diving, fishing.

Subscription pricing and terms

Harmonium can be used for free for 2 days only after installation on the device.

If you use Harmoniums continuously, please purchase the one month subscription with in-app billing.

You will be charged to your iTunes account when you purchase a subscription.

Subscription automatically renews unless auto-renew is tuned off at least 24-hours before the end of the current period.

Account will be charged for renewal within 24-hours prior to the end of the current period.

You can turn off auto-renew subscription at any time in your Apple ID account settings.

If you purchase a subscription during the free trial period, the free trial period will expire.

If the purchase procedure is completed, refunds can not be made even if you stop the subscription.

Terms and Conditions / Privacy Policy

Please read about our terms and conditions and privacy policy.



Full Specifications

What's new in version 0.1.2


Release May 2, 2020
Date Added May 2, 2020
Version 0.1.2

Operating Systems

Operating Systems iOS
Additional Requirements Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


Total Downloads 0
Downloads Last Week 0
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