The Science Behind The OneDevice

Healing Frequencies & Solfeggio Science: what we know, and what we don't yet

The OneDevice combines three approaches that have each been studied on their own for years. We also study OneDevice itself. We keep the two apart, so you can judge each on its own terms.

01Our own dataA 248-person pilot study on OneDevice users.See the results 02Research on the methods18 published studies on light, sound and frequency. Not conducted on OneDevice.Read the research 03What comes nextAn independent study, with every result published.See the plan

01 · The OneDevice Pilot Study

Of users who started with above-average stress, 89% reported less stress

We do not only point to the science behind our methods. We also study OneDevice itself. In our Insights Program pilot study, 248 OneDevice users completed a stress survey and a wellbeing survey before they started, then again after at least a week of regular use. Among the 111 who started with above-average stress, 89% reported less stress, and their average score fell from 11.7 to 6.0, almost half. Across all 248, 76% reported less stress.

Every participant, one dot

Change in each person's stress score, before vs. after.

189of 248 reported lower stress

Lower stress (189)No change (19)Higher (40)

Average stress score

All 248 people. 6-question stress survey, scored 0 to 18. Lower is less stress.

8.1Before

4.7After

061218

89%less stress, above-average group

11.7→6.0their average score

248people, before & after

Share of participants who reported improvement

All six measures, ranked. Including the smallest one.

Less stress76%

Overall wellbeing73%

Daytime energy67%

Physical calm62%

Emotional regulation56%

Sleep56%

How to read this

One group, no placebo or control group
Self-reported surveys
Run by OneDevice, not independently reviewed
Shows people felt better while wearing it, not proof the device caused it

View the Study

02 · Research on the methods

The science behind the three methods

The research below is on these general methods, not on OneDevice itself. It explains the principles the device is built on.

Based on the insights of 14,000+ peer-reviewed studies on PubMed.

Research on the underlying methods, not conducted on OneDevice

Light

Photobiomodulation

OneDevice emits gentle near infrared and visible light. Photobiomodulation studies how specific wavelengths of low-level light interact with the body. It has been explored for relaxation, recovery, and general wellbeing.

5 reviews & meta-analyses · 1 randomized trial · 1 other study

7 references

Sound

Vibroacoustic therapy

OneDevice plays specific sound frequencies, including Solfeggio tones. Vibroacoustic and sound-based approaches have been studied for their potential to support calm, stress relief, relaxation, and general wellbeing.

4 reviews & meta-analyses · 1 randomized trial · 1 other study

6 references

Frequency

Frequency and resonance

OneDevice is built around the idea that the body responds to specific frequencies. Research in this area is still emerging, so the evidence is less established. We include it because it is central to the device's design.

3 reviews & meta-analyses · 2 other studies

Research in this area is still emerging.

5 references

03 · What comes next

An independent study, published either way

We're launching an IRB-approved study, led by an independent principal investigator. It will use validated questionnaires and track HRV from wearables alongside self-reported wellbeing. We commit to publishing all results openly, whether the evidence is conclusive or still developing.

✓
Pilot studyDone248 users, stress and wellbeing surveys before and after.
2
IRB-approved studyLaunchingIndependent investigator, validated questionnaires plus wearable HRV.
3
Published resultsEvery result made public, including the ones that don't flatter us.

See for yourself

Run your own 90-day experiment

Give it 90 days and let your own experience be the proof.

Try the OneDevice Read reviews

OneDevice is a wellness product, not a medical device, and is not intended to diagnose, treat, cure, or prevent any disease.

Solfeggio Frequency Guide

The Solfeggio frequency list and chart

Solfeggio frequencies are a set of tones, measured in hertz (Hz), that are widely used in sound healing and meditation. Below is the commonly cited Solfeggio frequency chart and the benefits traditionally associated with each tone. These associations come from sound-healing practice rather than clinical proof, which is why we also study OneDevice directly. For a deeper look at each tone, read our guide Solfeggio frequencies, explained.

Frequency	Traditionally associated with
174 Hz	Grounding and physical ease
285 Hz	Restoration and recovery
396 Hz	Releasing fear and tension
417 Hz	Letting go and facilitating change
528 Hz	The "miracle tone": calm, renewal and transformation
639 Hz	Connection and relationships
741 Hz	Expression, clarity and problem-solving
852 Hz	Intuition and inner balance
963 Hz	Awareness and a sense of oneness

Frequency healing FAQ

What is a Solfeggio frequency?

A Solfeggio frequency is one of a set of specific tones, such as 396 Hz, 528 Hz and 741 Hz, used in sound healing and meditation. Each tone is traditionally linked to a different emotional or physical intention.

What is the best healing frequency?

There is no single best healing frequency. 528 Hz is the most popular and is often used for calm and renewal, 396 Hz is used for releasing tension, and lower tones like 174 Hz are used for grounding. Many people combine several, which is why OneDevice emits multiple Solfeggio frequencies alongside infrared and visible light.

What is the best Solfeggio frequency for sleep?

528 Hz and 174 Hz are the Solfeggio frequencies most often used for sleep and relaxation, usually as part of a calm wind-down routine before bed.

Does frequency healing work?

Research on light therapy (photobiomodulation) and on sound for relaxation is promising, while evidence for specific Solfeggio tones is still early. That is why we publish our own pilot data and are running an independent study, with every result published either way.

How does frequency healing work?

The idea is resonance: rhythmic sound and light can influence the nervous system and encourage a calmer, more regulated state. OneDevice delivers this passively as a wearable frequency device, so there is nothing to switch on or listen to. Learn more about frequency wellness and nervous system regulation.

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