# Waveful — Frequency Sounds

> Frequency Sounds (iPhone/iPad app by PURPLE NIGHT Inc.)

- Source: https://appshunter.io/ios/app/waveful/id6769578524 (this page in markdown: same URL + `.md`)
- Developer: [PURPLE NIGHT Inc](https://appshunter.io/developer/1868378073)
- Category: Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 4 MB
- Languages: English, French, German, Hindi, Indonesian, Japanese, Korean, Portuguese, Chinese, Spanish
- Released: 2026-05-31
- Data updated: 2026-07-06
- User reviews in markdown: https://appshunter.io/ios/app/waveful/id6769578524/reviews.md

## What is Waveful?

* Sound-based Wellness App Inspired by Frequency Research

This wellness app provides frequency (Hz)-based sounds inspired by scientific papers and research studies. Explore sound categories such as Motion Comfort, Relaxation, Focus Support, Meditation, Ambient Noise, and Guided Breathing to create a more comfortable listening experience in everyday life.

* Available Sounds
1. 100Hz Motion Comfort / Gentle Low-Frequency Support
- Inspired by research published in Environmental Health and Preventive Medicine by researchers from Nagoya University, Japan (2025)

2. 432Hz Relax Mode / Relaxation & Sleep Support
- Inspired by research published in EXPLORE by researchers from the University of Florence, Spain (2019)
- Inspired by research published in Journal of Applied Oral Science by researchers from Valdivia, Chile (2020)

3. 528Hz Relaxation Tone / Calm & Relaxation Support
- Inspired by research published in Health by researchers from Juntendo University, Japan (2018)

4. Binaural Beats Focus Support / Concentration Aid
- Inspired by research published in Psychological Research by researchers from UNED, Spain (2019)
- Inspired by research published in PLOS ONE by researchers from the University of Duisburg-Essen, Germany (2023)

5. 40Hz Gamma-Inspired Sound / Cognitive Focus Support
- Inspired by research published in Journal of Neuroscience by researchers from the Pamplona Medical School, Spain (2002)

6. Ambient Noise Layer / White, Pink & Brown Noise
- Inspired by research published in Journal of Clinical Sleep Medicine by researchers from Weill Cornell Medical College, USA (2022)
- Inspired by research published in Frontiers in Psychology by researchers from Hamburg University Hospital, Germany (2015)

7. Guided Breathing / 4-7-8 & Box Breathing
- Inspired by research published in Neuroscience & Biobehavioral Reviews by researchers from the University of Caen Normandy, France (2022)

8. 963Hz Meditation Tone / Deep Meditation
- Direct clinical evidence regarding the specific effects of 963Hz remains limited.
- This feature is designed as a high-frequency meditation sound intended to support deep meditation and immersive listening experiences rather than medical treatment.

9. 639Hz Harmonic Energy / Harmonious Atmosphere
- Direct clinical evidence regarding the specific effects of 639Hz is currently limited.
- This feature is intended to provide a soft harmonic tone for creating a calm and harmonious atmosphere.

10. 72Hz Deep Grounding / Low Frequency Grounding
- Direct clinical evidence regarding the specific grounding effects of 72Hz has not been established.
- This feature is designed as a low-frequency sound intended to create a calm and stable listening environment.

11. 1122Hz Clarity Tone / Clear High-Frequency Tone
- Direct clinical evidence regarding the specific effects of 1122Hz remains limited.
- This feature is intended to provide a clear and crisp high-frequency listening experience that may support focus and mental clarity.

* Recommended Listening Time
- Motion Comfort: 1 min
- Sleep / Relaxation: 20–45 min, default 30 min
- Stress Relief: 10–30 min, default 15 min
- Focus: 15–45 min, default 25 min
- Meditation: 10–30 min, default 15 min
- Energy / Awakening: 5–15 min, default 10 min
- Cognitive Focus Support: 10–20 min, default 15 min
- Deep Grounding: 5–20 min, default 10 min
- Spiritual / Intuition Sounds: 5–20 min, default 10 min

*How to Use
1. Wear earphones or headphones for a more immersive experience.
2. Select your preferred category and press play.
3. Customize the playback timer as needed.

* Key Features
- Custom Hz settings
- Background playback
- Multiple timer options

This app is a wellness tool inspired by research. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. Individual experiences may vary. Consult a qualified healthcare professional for health-related concerns.


## Version history (last 3 releases)

### 1.0.2 — 2026-07-01

Modified based on user feedback

### 1.0.1 — 2026-06-23

Modified based on user feedback

### 1.0 — 2026-05-31

No release notes.

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All apps by PURPLE NIGHT Inc: https://appshunter.io/developer/1868378073

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-06.*